 Kedok Ketawa was not the first contemporary film featuring a masked hero . Tan 's Film had released Gagak Item ( The Black Crow ) , with Rd Mochtar as the masked Black Crow , in 1939 , and later productions , including Java Industrial Film 's Srigala Item ( The Black Wolf ; 1941 ) , continued the trend . As was common for contemporary productions , the soundtrack for Kedok Ketawa – performed by Poniman – consisted of kroncong songs . 
 Kedok Ketawa <a href='negative_concord' title='1'><mark>was</mark></a> <a href='negative_concord' title='2'><mark>not</mark></a>the first contemporary film featuring a masked hero . Tan <a href='null_genetive' title='3'><mark>'s</mark></a>Film <a href='been_done' title='4'><mark>had</mark></a> released Gagak Item ( The Black Crow ) , with Rd Mochtar as the masked Black Crow , in 1939 , and later productions , including Java Industrial Film <a href='null_genetive' title='5'><mark>'s</mark></a>Srigala Item ( The Black Wolf ; 1941 ) , continued the trend . As was common for contemporary productions , the soundtrack for Kedok Ketawa – performed by Poniman – consisted of kroncong songs . 
Kedok Ketawa ain't the first contemporary film featuring a masked hero . Tan  Film done released Gagak Item ( The Black Crow ) , with Rd Mochtar as da masked Black Crow , in 1939 , and later productions , including Java Industrial Film  Srigala Item ( TdaBlack Wolf ; 1941 ) , continued thdarend . As was common for contemporary productions , thedaundtrack fa Kedok Ketawa – performed by Poniman – consisted of kroncong songs .