New one for me!! Never seen before.. uni-lug small bolt wheels

[Mtrhead]

ET lV wheels are uni-lug and step down from 5 on 4.5" to 5 on 4" pattern...hell they might even work on 5 on 4.75"each pattern would requireits own washer either center oval or offset......special keystone style offset oval washer is used for 4"pattern...even small bolt wheel spacers...cool vintage stuff

 

[Garrett Ellison]

ET unilug pattern that uses the combination 60 degree / extended shank lugs.

 

[Professor Fate]

Yup, had a set of those many, many moons ago. The only Uni-lug type wheel I ever saw that worked with a 4" bolt circle.
Bought 'em at the J.C. Penny Automotive Center, IIRC.

 

[Syleng1]

Second that! I had those back in the 80’s
Without the washers they loosen up at any speed and make Ralph Nader nervous.