Featured 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 !

 

Good find Bosko--- I think it looks promising too.

 

Promising and charming. Always love that colour combination.

 

Good fer yew, Bosko!

 

I don't see how that's a whistle..?

 

Some of them are just rattles.

 

wouldn't the stones fall out of this one?

 

Maybe the crack in the shell prevents successful whistling by letting air escape instead of going all the way through?

It's a wonderfully well observed turtle face.