Help ID Tribal Rattle/Whistle ?

Found at a garage sale in Portland,OR on a table w/ repro & fantasy pre-Columbian ceramics. It caught my eye because of perceived (???) age-of course 99.9999% of theses artifacts are phony.
Polychrome surface seems to have age wear,cracking shows signs of glue,2 holes on base-with a large pea-size free rolling ball inside.Degradation of base glaze clay poss long-term ground contact ?
Shaken it makes a rattling sound-no sound when I blow on either of the large holes or the mouth slit.
Size- 7 1/2" lngth X 4 3/4" wdth X 3 1/4" ht.
Any opinions or info welcome-thanks !
PS- Will be hitting garage sales for nxt 3-5 hrs, sorry if incommunicado.

 

It looks promising. Probably from Costa Rica. Here is a similar one in the Met -


https://www.metmuseum.org/art/collection/search/502741

The deterioration on the bottom looks similar to conditions I have seen on genuinely old pieces - more than simple shelf wear.

 

Another example that shows the typical colors of Costa Rican pieces -
https://harn.emuseum.com/objects/6295/bat-effigy-whistle-ocarina

 

Thanks @2manybooks- ditto,Costa Rica was the only country of origin I could find for turtle rattles/ocarinas that didn't have much in the way of feet.
I never buy these pieces, but this one was suspiciously authentic-looking.
PS- Will shoot some pics to museums & auction houses. Note, even if authentic-not a priceless item, but just finding the real thing'd be a kick !