Large vintage Thailand wooden Lucky Frog Guiro Rasp musical instrument

As in most Asian countries, the frog is considered to be a symbol of luck and good fortune in Thailand - here translated into a traditional Thai musical instrument. The rasping stick is used to rake up the frog's back to create a low pitched croaking/chirping sound or lightly tap on frog's nose with the thick end of the rasping stick for a deep, resonating note.  The rasping stick is stored safely in the frog's mouth.  This vintage frog is in very good condition and an exceptionally large one (not often found in this size) - 21cm x 13cm x 13cm with 18cm long rasping stick.    Refer images