The 'Jukar' brand muzzle loader rifles, pistols and some shotguns were imported from Spain and sold in quantity in the 60's thru the 80's.
Lots of companys got into the BP craze by importing and selling them at very low prices. Kits were available too.
'Dikar' was another Spanish mfg name often seen on those guns and kits though Jukar was more common it seems.

They worked and filled a need at a price some people could afford. I'd bet they allowed an awful lot of people to get into BP shooting at the time.