Centurion LeMans Mixte (12 speed)
Serial Number N0D6xxx

SunTour kit, with stem-mounted "Power Shifters". RD stamped with what appears to be a sn

Diacompe centerpulls

Sugino chainwheel

Suzue hub

"27 x 1 1/4 w/o" Araya rims

Pedals stamped "MKS#QR-S2" and the wretched things must weigh two pounds all by themselves

cheesy-feeling aluminum handlebar with equally-cheesy "contoured" black plastic handgrips

the stem looks like a standard aluminum road stem, so the handlebars are actually lower than the elbow of the stem.

cheesy no-name leatherette sprung saddle

simple Dia 26.0mm straight seatpost

Deep metallic-ish blue with badly-done cream lug outlines and simple rust+offwhite pinstriping.

Decals are pinkish-white "Centurion" on the downtube and "Le Mans Mixte" on the chainstays. The typeface looks like a knockoff of ITC Eras. "Centurion" is in what looks like Extra Bold weight, and "Le Mans Mixte" in Medium weight.

Badge is round, cream-painted pot metal (or maybe aluminum) saying "Centurion Bicycle Works". Riveted on.

Sticker at the bottom of the seat tube says "Made in Japan".

It weighs 30 lbs (!!), per my balance-beam-type scale. Either it's made of gas-pipe or those pedals and the kickstand really add up.

So would it have been made in late Feb '80?