Just came across this auction on the NZ version of ebay:
http://www.trademe.co.nz/music-instruments/instruments/drums/drum-kits/auction-494619793.htm
They are pretty rough .. having said that they look to be black diamond pearl under that crud!
Using the Vintage drum guide badge page I would say Arai brand Stencil
http://www.vintagedrumguide.com/images/snare_japanese/badges/arai.jpg