3Rensho Allez were made in 81 and 82 - only.
They are QUITE easily identifiable.
1 - Offset fork crown. Positioned forward of the steerer centerline. 2 - Chrome Campy drops. There is NO other Allez with chrome drop faces. 3 - VERY long point lugs, filed to impossibly thin points. 4 - Hard to discern, but dark, blood red, metallic paint, with Allez on the downtube
Any bike with SE on the top tube, or which is blue, or has Tim Neenan on the chainstay, is NOT a Yoshi bike. These were 83 and later, made by Miyata, and perhaps others, and still very nice bikes. But not Yoshi "Special"-ized.
It may be a bit hard to recognize these from blurry ebay auction pics. They are quite rare.
Bill Roberts
Jacksonville, OR USA