I think genuine Collins machetes are collectors' items now. The firm closed about 1967. Used to be the standard brand...
My Corneta Model 127 is a copy of the Collins Model 127. Has a plastic handle, prob. a polypropylene. It is comfortable.
I got it over 20 years ago at an Army surplus store. I think this Corneta company is now closed, although another firm uses that name.
My Corneta was made in El Salvador. Tramontina, as Ray noted, is made in his land, Brazil. I've seen their steak knives in some US restaurants.
There's a photo of Ana Beatriz Barros on the Net, showing her standing in a jungle river, holding a vine above, a round-butt Tramontina with black handle tucked into her bikini. It is unsuitable for this board, but some may enjoy it. Alas, the blade is rusty or dirty from recent jungle use. I hope we all take better care of our machetes. No need to take care of Ana Beatriz: she married some billionaire a year or two ago. Has millions of her own, too.
I think that picture was taken by a Sports Ill. photographer who also worked for Victoria's Secret, where Ana B. modeled for some time. She was also in the SI Swimsuit Issue. Anyway, it's my favorite photo of a machete in "use".
I think the blade length is 18 inches. Ana Beatriz is about six feet. A girl who many men can "look up to"...