Nice, I have had but just recently inherited my Dad's 1100 from mid 80's. I had it pulled out but did not shoot it yet. I think it was probably in the mid 80's the last time it was shot. For some reason he just never took it out shooting?
Anyway, I looked at your picture of fully disassembled and I am going to do the same - looks complicated but you guys said it was not that hard. It is in good shape but think it might be a little dirty from sitting around for so long.
One question, there was a Remington 12g barrel in the safe too, but I am not sure if it was a replacement barrel or what? How do I know what this barrel is for? I am afraid my Dad did not tell me everything about his gun collection.