Chaterlea25 is being very polite. Albion made gearboxes from before World War 1 up to well in the 1960's. They made two, three and four speed boxes plus three speed and reverse. They came with both hand and foot change and were either top mount, bottom mount, or pivot mounted. On top of that identical looking boxes were made with different chain lines so they look as if they should fit; but they don't. As well as being made for motorcycles they were also fitted to light cars and all sorts of industrial and light agricultural equipment.
In short, identifying any particular Albion box can be very tricky.
There is a good side to all this. For all the variations they made they tended standardise on the internals so finding suitable internals for a restoration isn't so hard. It's the actual aluminium gearbox case that usually causes problems. Not only do you have to find one with the correct mounting, it also has to be repairable. Many aren't.
Anyway, I look forward to your photos and details.
Cheers,