Good question.

Worksman makes the frames for the bikes. Parts like handlebars, forks, seats, seatposts, etc., are available through Wald, Pyramid, and others, and I think a lot of these items are just off-the-shelf items, meaning, they're imported. American-made inner tubes simply don't exist, so they're imported. The tires appear to be Cheng Shin, although they are branded WTC (Worksman Trading Corp.) I think Worksman builds the wheels, but I don't know where the parts come from. My rims just say "Worksman Cycles" and don't show the "Japan". The rear coaster brake is a Shimano, so it's obviously imported. It wouldn't surprise me if the rims were imported, but I don't know of anyone else that uses them, so they're not quite as off-the-shelf as, say, the handlebars.

You might email Worksman with the serial number and other info and see if they can help you on the age of it. They were able to place my trike in the 1970-1985 era. Serial number should be on the bottom of the bottom bracket.

The older bikes have different forks, not sure what to call them- the BMX-style welded forks are newer. But I don't know when they changed.

This bike didn't by any chance come from Tyler, did it? There was one for sale there at a good price a few days ago.