Yes the S2 is the S1 but with a Selenium meter. This S1 manual is far more informative than the S2 I have so thanks a lot for bringing it to my attention. 32mm it is!
This is the only Kodak I own and it's in virtually mint condition. Very rare to find these days. My other cameras are Rollei, Agfa, Voigtlander, Zeiss Ikon, Mastra (about 30 in total). All working and I hope to get round to running film through them all.