Two Agfa Isolettes - one an Isolette 1 with intact bellows, frozen-stiff Agnar lens and good working shutter. The other, an Isolette III (don't think the seller knew it was a nicer model, I could only tell by the photo of the embossed lens cover). Apotar lens and Prontor SV shutter. Trashed bellows covered in tape - RF dial, lens and shutter frozen solid.
Now I have a 40mm Isolette pinhole, with shutter and flash synch, and the front door closes vs. tearing it off (there's a lens board that slides out a few mm to not go insanely wide); and a fully functional Isolette III with the Apotar.
Both lenses took a bake in the oven and a twist with tape and hose clamps to get apart - soaked one for a week in 99% iso, wouldn't budge. 20 minutes at 180°f did the trick.
The RF was glued solid as well. Solvent didn't help, so I touched a soldering iron to the end of the screw and used snap-ring pliers to slowly free the mechanism up. Heat has been the only effective thing for me when it comes to the dreaded green grease. Cleaned all the optics and re-lubed the focus and RF threads. Just collimated the lens this AM and it's all good. Actually looks nice and sharp wide open.
I tested the slower shutter speeds with a 120fps video camera. Up to 1/100th, you can shoot footage of the shutter and count the frames, and do the math. Every speed up to 1/200th is almost exactly half speed, so that's easy to keep in mind when shooting. Will run some film in the next few days. Overall digging it, pretty groovy little camera that I can keep handy or stick in the glove box when it's not 110° out. Maybe $40 spent in total for both.
(BTW, I'm a digital video guy by day - I've found the LCD loupes that attach to the DSLR screens are just the shizz for anything requiring "faux ground glass" viewing. I use a piece of matte acetate on the film place and hold the loupe to it, and throw a 1K fresnel up. Going to try to dial in my flipped-lens brownie from close focus to a more portrait length with it).