My maternal grandmother died a few years ago, and the family is still cleaning out the house (don't ask). Although I thought I had all the photographic equipment in the house, I recently found more that has sat for several decades. My grandfather was the family photographer, and he'd not used any of this since he purchased his (now my) Sears KS-2 in the early 1980s. I found the body cap for the KS-2, the box for a flash he had in the camera bag, and what I think is a box of projector lamps. Most of what I found are flash cubes. There is a full display box of GE Magic Cubes my aunt had purchased from the company store (she'd worked for GE) and a lot of loose magic cubes. I have used flash cubes and bars when I was a kid. These will be nice for the Instamatics I'm trying to resurrect (though I bought an electronic flash for those). The interesting thing I found was a Canon J-3 Flash Unit. It takes both AG and PH bulbs; cold shoe with PC cord. Again, it's not that I need this (I've an electronic flash with PC sync), but I just have to try it out sometime - probably on my Ikon Contessa and Voigtlander Vitessa. These are before my time, though when I was very young I remember a few family members using old cameras with bulbs. If I know that side of the family, there are some bulbs stashed away somewhere. Is there a preference between AG and PH bulbs? Any general advice?