Olympus OM-System S Zuiko 35-70mm f/4 and an Olympus OM-System E Zuiko AUTO-T 100mm f/2.8 for my Om-1, OM-1n, and OM10.
Plus 49mm and 72mm R72 filters to play around with some Rollei infrared.
Oh, and a dirty Mamiya C22. I wasn't expecting much and didn't pay much for the C22 but when it arrived I cleaned off the crud and dust, slapped an 80mm lens on it and ran a quick test roll of Arista through it. It fed fine and only had a small light leak from the old seals. I should have it up and running in a week or two (needs a bit more cleaning and I want to go over the feed mechanism) and hopefully with new leatherette. Not bad considering I really only bought it for the WLF......