I found this
weight of a 56 cm Look Equipe frames: 2.6 kg. That is close to what mine is (2506 g).
The examples of serial numbers I've found are:
B45S45 - from the eBay listing above
B62S16 - a bike found in Japan
B57S194 - this is @gaucho777 bike
This makes me curious about the serial number of my frame, |56S441
and A7
. If 441 signifies the 441th built, then it is later than the other frames listed above. It is curious that my frame has no "B" in the serial number, instead it has "|" (a vertical line).