wrt the bicycle's chainset -

while it looks decidedly newer than the balance of the machine it is actually "in the ballpark" contemporaneous.

as mentioned above machine looks like it is prolly not much earlier than 1976. in 1978 Verot did a major reworking of their range. the 93 model was discontinued and the 99 model revised into the second generation type we have here. this was also the time that the 104 and 105 models launched. iirc the company went to a standard puller thread at this time.