Scooterotica

can sumbody tell me the prefix on a jet 200 frame plse or is it all numbers if so how do they start? Thanks

I believe it's 'sx 200'..................

this is what is stamped on my mates' Jet 200 frame

1966 - 1972 ...500001..............
1971 - 1980....550001.............

thanks for that m8