I'd concentrate on the seat stay cap design, which looks like ones on Guerciottis -- the squared-off top end is unusual, However, the lug points look a bit longer than on G. frames I've seen, unless it's early, which the fork crown and lack of braze-ons suggest anyway.

Any idea about the tubeset (might be marking on the steerer tube when you disassemble). And what does it weigh with BB, clamps, headset loose parts and anything else you can get off it removed?