Right, I found the numbers...........
51801925561
So thats 5 (dropout spacing)
18 frame size
0192 January 1992.
And 5561 is the build number.
That confirms what I was askign in another thread, its listed (and numbered) as an 18inch frame becasue its equivelant to the 18's in the normal frame geometry, but the BOTE geometry means that the actual seat tube is about 15-16 inches. long