G'day all Really great contributions from vint_mow, Max, Gadge and Gizmo
The trouble here is matching the 8 Series Briggs to HG Palmer's first lawnmower - the HG Palmer Utility of 1960.
The Utility must have been a successful design - it certainly employed - through its lifespan - about half-a-dozen engines!
Did Palmer's use the first vertical shaft Briggs sold here on its first base? The answer is ... YES.
My best guess is that Palmer used the Briggs on their utility base in late 1960. However, by late 1961, Palmer's would reserve the Briggs for the Utility Deluxe.