Is this a primary gear set for smallframe?

Just saw this on ebay in germany, it is an rms primary for vespa, however it dont state if its for a smallframe or not, also on the worb5 site there arent any 29 tooth primaries so im a bit lost…

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=8001155432&fromMakeTrack=true#ebayphotohosting

Ah ok, after further searching, it looks like this is actually the primary for a 50, therefore useless.