Do you mean "the actual gun" or the same type?
I tried to do some reasearch this year to find the historical world records for air rifle and pistol, it was not easy, and I could not get a complete record. The ISSF was very helpfull but it was not on computor in the early days and they have not done much to place the early ones on electronic record. They had also lost some of the records in the change from I.S.U to U.I.T. and then to ISSF. They did not record at all (and I don't think do now directly) which guns were used which was one of the things I was interested in.
The best route to find out is look on press picture for current ones and the manufacturers web sites for the older ones or enquire to them.
It would be an interesting collection, but even if it was the actual guns I doubt it would add to the value.
Hemmers, we were at Walther in Ulm in Oct and had the tour of the wonderful museum, our host was decrying the fact that as soon as Malcolm won gold they stopped making the GX1, I bought one, great rifle. We knew Malcolm well as my wife was in the squad, a great loss to our sport.
Good shooting
Robin
Walther KK500 Alutec expert special - Barnard .223 "wilde" in a Walther KK500 Alutec stock, mmm...tasty!! - Keppeler 6 mmBR with Walther grip and wood! I may be a Walther-phile?