I've got Yamaha bass BB 414 with serial numbers QPX193028 tryin figure out what year?

Not sure about the serial #... but 'C' clarinets are not common.
They are slightly shorter (2" perhaps? ) than the far more common Bb clarinet.

Jon has told you about the serial number.

Don't get Fender Fenders confused with Squier Fenders either.

Once you know the serial number you should be able to find out the year here

http://www.guitardaterproject.org/fender.aspx

Then you could try Googling:

"reverb.com Fender Jazz Bass (year)"

and you will see a range of used prices.

fixya doesnt do evaluations

What is tthe problem? You don't state any symptoms. If you are after dating information try this site:

http://www.yamaha.com/apps/guitararchives/serialnumberwizard.asp

Here is the link you need:http://europe.yamaha.com/en/products/musical-instruments/guitars-basses/el-basses/rbx/rbx374/?mode=model The manual is down loaded in pdf. Scroll down the page. The serial number has nothing to do with the manual only the model number applies.

supported here and those formats offer no clue as to where these guitars where made.
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The serial numbers repeat evry 10 years... you have to know what decade is likely thenfrom the Yamaha wizard: Your guitar was made on
January 15th, 1985, 1995
or 2005
Production Number: 3

According to yamaha's site, that's an invalid serial number??!!??

I would guess that might be the date code.

Other sites report 5, 6 and 8 "digit only" serial numbers.

Nothing for 7 numbers.

If i had to guess, the earliest...1971
Hope this helps.

www.Yamaha.com/apps/guitararchives/guitarserial.html is guitar& Bass Serial Wizard plus it gives a phone number

Check www.yamaha.com/apps/guitararchives/guitarserial.html
It gives dates from old serial numbers

GO TO ASK.COM FOR HELP