Huh!
Bolers weren't made in 1950, not til the late 60s, I believe, and never out of aluminum/wood (fibreglass). Maybe by "Boler" they mean "a small vintage travel trailer", as Bolers are well-known in the prairies.
I had thought til recently that my parents used a
Boler for their honeymoon, but the dates are all wrong! I think we have a "Kleenex" meaning-all-tissue kinda thing going on here.