That is an interesting serial number. I have one very similar, also from 1975, but AC, which means export for Canada. Actually, mine is almost identical - AC 75-025! So I do not think it is the 25th Alembic ever, but is probably the 25th Alembic made specifically for Canada. Are you sure there isn't an AE in the number? That would mean it was made for export and would be the 25th. (The serial number explanation is
here - no LSB though...)
Hopefully there is more information at Alembic!
(Message edited by hieronymous on September 04, 2008)