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Hello William,
the CZ logo visible on the tread and dustcap is that of Jawa, maker of motorcycles, mopeds and bicycles.
the pedal would have been produced in CZ during the communist period.
it is a real challenge to locate a mate for a single pedal.
possible you may be able to purchase a new set on one of the ebay sites.
during the seventies and early eighties there was a distributor/importer in the U.S. for the bicycle products. they were called American Jawa and were located in Valley Stream NY. IIRC they closed sometime during the 1980's.
another place you could check would be with the commercial attache at the Czech embassy in Washington. they have files/records on all Czech manufacturers with contact information.
at the time of the pedal's manufacture there was a parent entity above Jawa which handled exports. it was called Motokov Praha and would be roughly parallel to what is termed an export group in the west.
the bicycle brands produced and exported under this arrangement included Favorit, Jawa, Rapido, Pioneer & Velamos.
when searching for pedals on ebay and similar sites you can try searching under these names as well.
hope this has helped you a little.
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