Matchbox Lesney Kingsize K 8 c Traxcavator Driver.
Not an exact match, it is a copy of the early Moko Caterpillar tractor driver and includes the driver holding the control arms.
Approx. 24mm (1") total length, 14mm (1/2") from seat to top of head, and about 8mm (5/16") across the bottom to fit the seat.
White metal casting can be filed to suit (test or dry fit first!) before cleaning and painting.