1987 or 1988 Shogun Samurai. 25"/63.5cm. Originally with full Shimano 1050-era 105, a Tange Levin headset, and BB. I have converted the 105 to 6400-era 600 for better matching (the original rims were a dark bronze which didn't play well with the teal color). Obviously the FSA Krono 54T big ring is not standard, neither is its companion 39T behind it--they just look cool and help complete the aesthetic composition. Bought the bike from the original owner. Eager steering at any speed, but stable enough at high speeds and descents. Great sprinter and out-of-the-saddle climber. Looks fantastic to boot, IMO!

Serial Number: SF709243 with an additional S8P, both on the BB.

I've tried to ascertain production month via the other stated serial numbers listed in this thread, but have come away bewildered.

Measurements:

Frame size: 63.5cm/25" (CTT)
TT length: 57.8cm or very very close
BB drop: 69mm
Seatpost diameter: 26.6mm
Front Center: 608mm
Rear Center (as shown): 413mm
Wheelbase (as shown):1010mm
HT°/ST° (as measured): 74.0°/74.5° (!)
Fork Offset (calculated via CAD): 46mm
Geometric Trail (with 23mm tires, calculated via CAD): 50mm