Here's a nice Rollei lenshood in excellent condition, in its fitted
leather case -- also Rollei. The bayonet mount. It's about 1.9 inches
or 50mm in diameter. I tried it on a f 3.5 Rolleicord, and it was
much too large -- so perhaps it fits the f2.8 Rolleiflex? You Rollei
people will know. It is in like new condition -- no paint loss, no
flaws.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330016047556
