I can't help wondering if the rope-tensioned drum is actually a bombo legüero - anyone know for sure?
Yes ... that's why I didn't say it was a Bombo!
Turista instruments can look like a lot of different things.

Seriously though, many instruments have different names based on who you talk to and depending on the region the instrument is located. I would suggest that the drum in question is not a Bombo (too small), but has many of the same qualities of a traditional Bombo. Having a skin head with the fur left on it helps to dampen the sound, thus enhancing the low frequencies (roll-off the high frequencies). You'll get a low tone from the drum ... even with a small diameter like these drums.
All of the Bombo/Bomba drums I've ever seen or played were much bigger than this ... and bigger than the drum in the photo you've supplied. Keep in my
bombo is Spanish for Bass Drum; in Portuguese it's
bomba. Perhaps in Argentina the
Bombo legüero is smaller than your typical Bombo. I have a friend who was born and raised in Argentina; perhaps she can clarify some of this for me.
 | | Here's an example of how big the drum is typically. This photo shows a gentleman making a Bombo drum out of a Ceibo tree ... in Argentina. See how big the tree trunk is? Imagine how big the drum will be when he's finished. That's how big a Bombo typically is. |