Although I can't provide any help on the frame, I will point out that that is a pretty early, but not that early, record headset. You can tell by the rounded profile of the bottom of the crown race. But the upper cup having text indicated it probably dates to the late 1960s. The Cinelli stem is a 1A and possibly the first generation. if it is, it will require a 7mm hex key for the cinder bolt and have a nut for clamping the bars, small grooves in the handlebar clamp surface and a Patent number on the underside (opposite the Cinelli oval logo). If it is, it's worth a surprisingly handsome sum also, as are the earlier headsets in good shape, though this one appears to have been damaged by improper tools.

it's a nice looking frame and an interesting thread.