Globe Skate Corp. "Jetset" Keyless Adjustable Roller Skates Over-shoe-wear

From GLOBE SKATE CORPORATION made in the 1960s, these "Jetset" metal roller skates worn over your shoes were innovative for the time because they were KEYLESS (sorry about the song, Melanie). These adjusted using a sliding size adjustment with wing nut. Leather straps. These are in relatively good condition--please see photos. I suppose they could be used with a little oiling, but my guess is mostly for looks at this point in their lives.