Sorry Tjeu, I can't help you.
This frame is too old for me to know it well.
I had my doubts when I saw Chancertime's track frame, but the Gazelle stamped mark and the frame number look damn original. Not the paintwork and decals of his frame.
Yours looks more original (paint, decals), but I can't look underneath the BB shell.
I don't know the style of the seat stay caps, but it seems that this was normal (early 1970's?).
For the rest both track frames do have some Gazelle marks.
I would say: don't worry.
Sorry Tjeu, I can't help you.
This frame is too old for me to know it well.
I had my doubts when I saw Chancertime's track frame, but the Gazelle stamped mark and the frame number look damn original. Not the paintwork and decals of his frame.
Yours looks more original (paint, decals), but I can't look underneath the BB shell.
I don't know the style of the seat stay caps, but it seems that this was normal (early 1970's?).
For the rest both track frames do have some Gazelle marks.
I would say: don't worry.
(yes, I'm Dutch, too)