TOPIC: 1965 GW Invader ID number

I recently bought a 10 ft GW Invader mini boat. Does anyone know where a hull ID or serial number might be on this? The guy I bought it from was told it was a 65 model but was unsure. Looking around for information I find conflicting info that they started making them in either 1965 or 1967. Anyone know for sure? Thanks

Take out the seat and use a hand mirror to look at the underside of the lip between the motor well and the cockpit. Should be there. Serial should start with 10 and be five digits long.