Everyone, I have had lots of early Alembics. I have owned several from 1975 and 1976 with the bridge slanted like that. I assure you that it must have come this way. Poke around in the showcase section of the 1975 series 1 instruments. It was common.
As far as the serial number goes, the the zero in front of the 33 is not a zero, but an O (alpha). Trust me on this one. I have had basses from that era with that same marking. When I contacted Alembic about this, the person I talked to did not know why the O was there, or what it meant. It is just there. I was told that the person that used the O in the serial numbers is no longer with Alembic, so they didn't know what it meant. Serial number 33 would have been from 1973, I know because I owned that instrument too.
That is definately a zebrawood top. I remember several basses from that era with that type of wood. I owned 1976 O62 that had that top.
Mica - When I was considering a new custom, the look I was hoping to get with the koa top is exactly like this bass. The birdseye zebra is what inspired me to use that type of koa. I think the birdseye zebra is gorgeous under that yellow finish. With the Koa it can have that same hue with a clear finish. Maybe one day.
What a beautiful bass!!! If it only was a short scale. I think the strap button is in the wrong place for my tastes too.
Michael