Mystery Bottom Bracket, any ideas?
So, I've looked all over the internet, I've gone to several LBs, and I can't find the right tool to get this old bottom bracket off. The vintage specialty shop I went to had never seen it before, and told me to just take a hammer to it to remove it. I'm just wondering if any of you brilliant bike-minded folks new what it was, and where/if I could get an appropriate tool to remove it so I can grease it.
It comes off of a 1982 Trek 720. Other components on the bike were Dura Ace ax (stem, crank, pedals), Suntour Cyclone Mach II derailleurs, Phil Wood hubs and Winemann wheels.
Thanks in advance for any help!