hidden treasure?

[Hiddentreasure]

Re: Re:

History of Gazelle bicycles here.
https://en.wikipedia.org/wiki/Gazelle_(bicycle_company)

Gazelle GM frame numbers info here.

https://www.gazellechampionmondial.nl/framenumbers.html

thank you, that helped, so 1 bike is 1980 and the other 1976