Just the usual film suggestions for those limited exposure cameras... ISO400 for dull days, ISO100 for full sun days. If this is a No.2 Model F, keep in mind that you have 3 apertures to change your exposure, it's something like f/8 (tab pushed down all the way), f/16 (tab halfway up), and f/22 (tab all the way up). Should be the tab on the right, the left one if you pull it up will put the camera into bulb mode, but since you've opened your's up you probably know that all now. The viewfinders are hit or miss on some of the brownies. I think I've been lucky, they've nearly all cleaned up nicely or were in good condition, even the No.2, Model B at the ripe old age of 103 or so is quite crisp in its viewfinders and lens.