I was importing the "flag series" and roulette jetons in mass quantities about 9-10 years before the euro was introduced, so they were out of play, prior... but not for too long. Before the "flag series" was the "facade series" which I believe had to all be destroyed as was the series after the "flag series" up to the euro...

The 50Bef was made in a few colors so they might have been Roulettes (like you said; about 30-years ago). I think I have two colors of the 500 from that serias.

There's a pic of the complete "flag series" on page 195 of Tegtmier's CASINOS; printed in 1988. Shows everything layed out on a Roulette table