I guess the fear is, somebody might try to use it somehow, though I can't imagine what good a 1973 Alembic serial number would do. Unfortunately, keeping such a close hold isn't going to help with the sale of a pretty messed-up bass.
I was thinking yesterday; there's only so many numbers that it
could be... I'm not exactly sure when on the evolutionary timeline this soft upper horn Standard Point body happens from the symmetrical horned Standard Point body, or if they were created simultaneously. There are quite a few Small Standard short-scale basses around this time too. Whatever the genesis, the different styles seem to be clustered in small groups, which makes sense especially if you think about it from a builder's perspective.
A few '73 models we know about from various threads here are:
#73-27 is McVie's symmetrical Standard Point.
#73-30, 32, and 33 are all Small Standard short-scale basses.
#73-39 is another soft upper horn Standard Point, maple top.
#73-43 also soft upper horn Standard Point, schedua top.
#73-44 is the "missing" or "skipped" serial number. *Might be the Tiran Porter bass, which is a soft upper horn Standard Point body too. Fits right in this time frame, but no number.
#73-45 is a guitar. Small Standard body, walnut top.
#73-47 is a Small Standard short-scale bass, and is the last 1973.
Don't know whether #48 bears 73 or 74 year stamp, but...#74-48 is s SS guitar. (*hat-tip Eiji-san!)
#74-49 is a Small Standard short-scale bass.
So given its construction and features, there are a handful of empty slots this one could conveniently fit into, but I'm guessing it's going to fall between #73-34~46. But then, I may be totally full of sh...ugar.