Help!ANYONE?

Hi friends!I really need help identifying an old mint guild all mahogany dreadnaught I own-case is even almost mint (99.5%) w/ care manual (mint) that's electrified.A beautiful find!
BUT.....the pic. of a D15 looks exactly like it except for what "looks like" factory electronics,but mine says model # DO15A12 (mine is 6 string).
The serial# isD150393.The # are hand written-could I be seeing them wrong(don't think,so-only if D was a B but guild didn't make a B15.....CAN anyone assist? Rick sogoesmaine1776@aol.com

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Welcome to LTG!

If I read the table right, the SN fits with a D-15 from 1987. It was not uncommon for Guilds to slip from the factory with the "in house" factory model numbers instead of the catalog model numbers. I'd guess that is what happened, and what you have (if it has factory electronics) is a D-15E from 1987.