Yes, now I think the "scoops" are just where the spiraled rifling ends around the cup. They show up in this pic too, just not as pronounced:
__________________
1989 Schwinn Paramount OS
1980 Mclean/Silk Hope Sport Touring
1983 Bianchi pista
1976 Fuji Feather track
1979 raleigh track
"I've consulted my sources and I'm pretty sure your derailleur does not exist"