Mayes is still around, but is now owned by Great Neck, along with Buck Bros. Their products are still made in the U.S.
Said Mayes about this level:
Die-Cast Aluminum “Carpenters’” Level. Four pyrex plumb vials and two pyrex level vials fully moisture sealed. America’s greatest level buy. Finished in green and natural aluminum. Size: 2 1/2″ x 1 1/6″ x 24″. Weight: 2 lbs.
It’s a nice level. And mine is still accurate after, probably, 60 years of living in toolboxes.
I’ve been to Tennessee and have seen plenty of people way taller than 2′.
★ Mayes also makes the Squangle. I can’t vouch for the quality of that tool, but I can vouch for the name.