Welcome, Stephen.
Well, first of all, sorry to hear about your home being burned... I can't imagine a much worse personal tragedy. Glad to hear at least your Alembic was spared though.
Yours is an interesting number, in that those AE export numbers aren't all that commonplace. The first one that comes to mind is a near-neighbor to yours, and belonged to a much-loved, now departed member of this Board.
http://club.alembic.com/index.php?topic=6414.0 Georgie Boy's bass at
AE 76-069 was born on March 31st of 1976, so I'll guess yours wasn't far behind it. No idea how similar it may be, as no two are alike.
Alembic recently relocated their headquarters, so it may be a little while before Mica unpacks those dusty old file cabinets with all the old build records, so in the meantime, if you'll post us a couple pictures of your instrument, we can make a few somewhat educated guesses about the construction.
Again, Welcome to the Alembic Club!.