On the newer COAs, Pomona leaves the date blank and it is filled in by the dealer. It would be close to the date that the guitar shipped from Pomona. On the older COAs, the date on the COA indicates when it went through setup and final QC in Pomona, CA. Your instrument SN M2005121 would be the 5,121st acoustic instrument manufactured in 2020.Īs reference points, for the two Eastman acoustic guitars that I purchased in 2020:īased on this, your guitar was probably manufactured around June -July of 2020. The rest of the number is a sequential number that indicates the order of production. The first 2 digits indicate the year of manufacture, i.e. Seems like more or less a random number with no reference to any sort of date.ĭoes anyone know what the date on the CoA references? Is it a ship date? I bought the instrument on 3-22-21 so it wasn't in the system long.The SN is applied at the factory in China. I just bought a E20P, the CoA shows a 3-11-21 date. The construction dates and other data may not be completely accurate but they provide a general sense of when particular models were offered.(03-27-2021, 11:48 AM)pszy22 Wrote: If there is any logic to it, I can't seem to break the serial number code. maintains a data base of market prices for used instruments, which is used as a reference source by retail dealers, insurance companies, manufacturers, libraries, pawnbrokers, etc. However, most models were offered only for a limited number of years, so that most models’ construction dates can be narrowed down to a reasonable range. Serial Numbers do not provide an indicator of the year in which a particular model was built. It was relaunched by the German company AMI GMBH in 2011.

Brand then purchase by German Co (Made in China) but cannot be sold in US under this name.

Guitar maker Martin, based in Pennsylvania, created a line of inexpensive guitars in 1970 to compete with the increasing number of imported guitars from Japan and elsewhere.

Date martin guitars by serial number