I have a Proteus that I believe was made from their kit because it does not have a serial number. I bought it several years ago and the seller said he got it from the widow of an Iraq war veteran. She told him that her husband had built it but crashed it before being deployed. That alone is enough for me to hang on to it.

It has a Cinelli bottom bracket and Campagnolo drop puts. The lugs a appear to be the unfiled and very utilitarian on mine. Yours has the wrap around seat stays and mine does not. I have never seen a Proteus head-badge, I think that may have been custom made. I would be interested in buying it from you if you do decide to scrap the frame.