Caps have some surface rust.
https://spokane.craigslist.org/wto/d/otis-orchards-western-turbine-wheels/6877996341.html
“Western Turbine or hurricane wheels. 15″ x 8.5″ wide, 5 on 5.5 lug pattern, 4-5/16 (110mm) centers. Removed from 1954 Willys CJ3B.”