Hello Cyber Jack .
When I tried to find information about the mower and year it was made to help me to get it operational again if parts were required. I searched Rover mowers without much luck . So I started looking into the motor for a time line . I didn’t know about or see the number stamp as this beast was still covered in dry and wet muck build up. What I did find was that in 1976 Briggs &Stratton changed the engine logo colours to the red white and black and is still the same one used today.So 76 was my starting point in my search and how I came to find this forum. Sorry if you thought I meant it was made in the 70s.
