yes i have the box out , i been told its from an austrialian rs2000 as were the gear stink is its got detachable bell housing has 23 teeth on input shaft and my prop fitts the tailshaft , the casing nubers i have aswell i fitted new seals to it as the ones i got fitted the old ones were metal , the tail shaft casing number 72AA-7A039_AA , main casing number 71 WG 7006 AC if this can be of any help , many thanks