Well, thanks Olaf from Sweden, that was an interesting and useful comment about the New Sigmas and I agree with you that guitars tend to look better without a lot of bling. Glad to hear that the new owners seem to be keeping up the quality even if they are now made (as I understand) in China.

The rest of the new Guests, please don't ask for valuations on your Sigmas - it will depend on so many factors. Mudcat is an world forum and the value will depend on your local market, apart from anything else.

And if you read back the forum, you will come to learn that serial numbers on Sigmas tend to be decorative (internal bling, if you like) rather than informative. No-one, not even Stirling Webb himself, who hasn't been on the forum for years, could decipher the system Martin/Sigma used and they can't or won't say. It is probably correct to say that they didn't have a system as such, but each contracting guitar factory - and there were quite a few of them - used its own system, or just made the numbers up.

The only things that mean anything at all are i) the country of origin stamp - usually branded onto the internal brace along with the model designation and ii) the shape of the headstock "Sigma" . Internal labels are also quite useful if they are there, but they aren't always...

If you really need a valuation, take it to a guitar professional.