Okay folks! I have photos and the info on the giant acoustic bass I was asking about. It's a Harptone fretted 4 string (duh!) with spruce top. I can't tell what the body's made from but it doesn't have much grain, so I expect maybe a plain maple (as the hardwood aspect would give a good sound, right?) It's not Brazilian rosewood or mahogany or an exotic wood as far as I can tell. Model is B-4 and SN# is 2028-80. It's in really good (might I say excellent) condition, hasn't been out of the case since before Pete passed in 1988 (until now). It's been stored in a home with AC and heat so no extreme temps have touched it.
I will add a few pics. I'm really interested in the value of this because of the relative rarity of the insturment combined with the fact that it was used by Pete on many sessions he produced on various artists. I know it was used on BJ Thomas (my husband said he liked the tictac sound). As for how it came to be in Mexico, played in a Mariachi band (when he found it and bought it off the musician), I don't suppose we'll ever know.... But I know for sure (my husband Johnny had to deal with bringing the dang thing back on the plane on his lap!!!!! Obviously the rules about flying with a giant guitar were different back then.... But that's a story for another day.... and oh my....are there stories!!! lol!!!). Thanks for any leads or help you might be able to offer me!