Just finished this. I purchased the helmet body, including a nice leather sweatband, from forum member billmunny. Thanks! I sewed on front and back visors (140 holes each visor), sewed in a new silk liner, and installed all hardware. Interestingly small size 52. Note that when stitching on visors, I make one pass, and then return, resulting in a figure-8 thread pattern. That results in approximately 560 stitches! I chose to retain all original patina rather than polishing it up.
Ron
Ron