Originally Posted by
Camplex
Interesting... Please let me know what my serial tells you as I've only had the reporting of the former owner to go off-of in determining when this was made; the serial on the side is 236946. Perhaps of much later make than the owner thought? On the bottom of the BB is +GF+ 43
Here's a pic of mine with serial number. Mine was purchased as frame/fork from Mr. Griffith and reportedly a '74/'75 product.
That marking tells us yes, it's a Georg Fisher BB shell.
Closest I can come to on your lugs is they are a BCM model no. 14 with a pattern II socket.
Allegros are very nice riding and well-made, I'm sure you'll like yours.