Certina 25-671 From 1972: Certina 25-681: 36 x 40 x 11 LW: 18: Case 20 micron gold plated Date without quickset Various dial versions About from 1970 to 1973: 288 Automatic “Certidate” 5810 810: Certina 25-671 From 1972: Certina 25-681: 36 x 40 x 11 LW: 18: Case and dial 18 ct. Yellow gold Date without quickset About from 1970 to 1973: 288. Certina always had branded and non branded watches side by side but generally a higher grade movement is used in branded models. What you can do is to look at the serial number and on 60's models case backs look for a number that starts with 58 as this is the top of the line 25-651 automatic movement used from the late 50's to the late 70's. Date your Certina by looking at the serial number. 1938 0.000.000 1961 3.900.000 1948 1.300.000 1962 4.200.000 1949 1.500.000 1963 4.500.000 1950 1.700.000 1964 5.000.000 1951 1.900.000 1965 5. Research the manufacturer to find the meaning of the serial number. Some manufacturers, such as Bulova, have unique identifiers in their serial numbers. For example, beginning in the 1950s, Bulova began using a combination of letters and numbers to indicate the year of manufacture; an L stood for 1950, so L5 means the watch was made in 1955.

1. Excalibur Wind Up Watch With Serial Number
2. Serial Numbers By Year - Vintage Watches At Www ...
3. Certina Watch Serial Number Check
4. Cached

Thankfully Takamine serial numbers are a little more straight forward than some other guitar companies.

This article will look at what your Takamine serial number can tell you about your guitar and how to decode that number.

What They Can Tell You About Your Guitar

The main things that Takamine’s serial number tells you is the date your guitar was built – more specifically the month and the year – not the exact day.

It also tells you which number guitar produced your guitar was, during the particular month – i.e. the 1st guitar that month, the 22^nd, the 1,000^th etc.

This might give you some clue as to the day in the month it was made but not an accurate one – for example, if your guitar was the 5^th built that month, then it was likely to be on one of the first days of the month. But for most, the exact day of build and the sequential number it was built in that month, isn’t that important anyway.

Excalibur Wind Up Watch With Serial Number

So, the main thing this serial number will tell you is finding out the month and year of build.

Where Can I Find the Serial Number?

Takamine serial numbers are typically found on the neck block (where the neck joins the body) on the inside of the body of the guitar.

Decoding Takamine Serial Numbers

Now we come the important part – decoding the serial number. Thankfully this is fairly straight forward when it comes to Takamine, though there are, as usual, a few extras.

There are a couple of different serial number systems depending on which model and depending on where they were made and distributed.

Pro Series Models

Takamine’s Pro Series (which is pretty much all of their series except for the G series) models follow an 8 digit serial number system.

The first 2 numbers represent the year of production.

The next 2 numbers represent the month of production.

The last 4 numbers represent the sequential order of that guitar for the month.

O.k. so pretty straight forward right. But let’s take a look at an example to make it really clear.

Serial Numbers By Year - Vintage Watches At Www ...

• Example serial number: 08040781

From our example serial number we can see that this guitar would have been built in 2008 (08), in April (04) and it was the 781^st (0781) guitar built that month.

Said another way, this was the 781^st Pro Series guitar that Takamine built in April of 2008.

However, this system is only relevant for up to the end of 2012 – after that they adopted a new system (see overseas models below).

G Series Models

O.k. did I say that Takamine’s serial number systems were straight forward – o.k. I might have lied, just a little.

The G series is the exception. There is no discernable system for G Series models. No decoding going on here, unfortunately.

Models Distributed in Japan

Note that Takamine is a Japanese guitar manufacturer (more on Takamine’s History).

Any models that were distributed in Japan, as opposed to internationally, used a slightly different serial number system. It’s still an 8 digit system and the 1^st two digits still represent the year, the second two digits still represent the month, and the last 4 digits still represent the sequential order that the guitar was built in that month.

The difference is the first two digits for the year.

These digits represent the number of years since Takamine’s began in 1962.

For example, if the first two digits were “40” then that would represent 2002 (1962 + 40 years).

So, using an example: 41100035

This was the 35^th (0035) guitar manufactured in October (10) of 2003 (41 – which is 1962+41)

Japanese Made Models Distributed Overseas

Towards the end of 2012 models distributed overseas started to use the same serial number system as those that are distributed in Japan.

So, if your Takamine was built after 2012 you might see something like this: 51050213

This would represent the 213^th (0213) guitar built in May (05) 2013 (1962+51 = 2013).

Thanks for Reading

Apart from the G Series models, Takamine’s serial number systems are fairly straightforward and easy to understand.

If you have a G Series guitar, you might want to contact Takamine to see what they can tell you about the guitar. Otherwise, you should be able to decipher the year, month and the sequence in that month that your guitar was built.

Any questions or comments please feel free to leave them in the comments section below.

Image Credits

By Alan Levine (Flickr: EST 1962) [CC BY-SA 2.0], via Wikimedia Commons

Generally, it’s best practice to put unique constraints on a table to prevent duplicate rows. However, you may find yourself working with a database where duplicate rows have been created through human error, a bug in your application, or uncleaned data from external sources. This tutorial will teach you how to find these duplicate rows.

To follow along, you’ll need read access to your database and a tool to query your database.

Identify Duplicate Criteria

The first step is to define your criteria for a duplicate row. Do you need a combination of two columns to be unique together, or are you simply searching for duplicates in a single column? In this example, we are searching for duplicates across two columns in our Users table: username and email.

Write Query to Verify Duplicates Exist

The first query we’re going to write is a simple query to verify whether duplicates do indeed exist in the table. For our example, my query looks like this:

HAVING is important here because unlike WHERE, HAVING filters on aggregate functions.

Certina Watch Serial Number Check

If any rows are returned, that means we have duplicates. In this example, our results look like this:

Cached

List All Rows Containing Duplicates

In the previous step, our query returned a list of duplicates. Now, we want to return the entire record for each duplicate row.

To accomplish this, we’ll need to select the entire table and join that to our duplicate rows. Our query looks like this:

If you look closely, you’ll see that this query is not so complicated. The initial SELECT simply selects every column in the users table, and then inner joins it with the duplicated data table from our initial query. Because we’re joining the table to itself, it’s necessary to use aliases (here, we’re using a and b) to label the two versions.

Here is what our results look like for this query:

Because this result set includes all of the row ids, we can use it to help us deduplicate the rows later.