I have a clipless Waterman cap with patent date May 24, 1898 (how I know it's a Waterman). 2 1/2" long .43" OD. No chasing, mostly black with a little oxidization, no cracks. Came on a different pen and I don't need it so offer me shipping and a few bucks and it's yours. Came with an aftermarket clip which I'll include.

Roger W.