Joined: Jun 2009
Posts: 2,243
Likes: 1,658
From: PacNW
Bikes: Dinucci Allez 2.0, Richard Sachs, Alex Singer, Serotta, Masi GC, Raleigh Pro Mk.1, Hetchins, etc
the mention of the "scalare" body above is a possibility.
The other possibility is that the one on the right was a 6 speed and the outer cog was replaced with one that was intended for use as a middle cog.
on the 6 speed, the outer cog was theaded onto the 5th cog, not onto the body.
Reginas are not my first choice in freewheels for bikes I ride - I will have 2 5-speeds up for sale soon, one VG, one NOS, with nice chain
/markp