Nice find here  Strombecker upgrade  part 8433 12 tooth pinion gear set of 2   NOS new old stock from 1960's  in original / packaging. ...these are a critical part of your vintage slot car's performance and super rare to find 
 See my other Stombo NOS parts for sale 

I have recently acquired a huge lot of vintage stock car parts.   Tires / chassis / parts / full cars / motors / bodies / kits 

Great news is ..... I will gladly combine shipping on any items  .... like buy set of tires / guide set & set of Mags ..one shipping charge