The last photo shows the mower it was removed from. Parts have been cleaned but you might want to clean them further.
Flywheel Starter Gear Atco Balmoral 17SE AQ 148 Engine Cylinder Lawn mower
Atco Balmoral 17SE AQ 148 Flywheel Starter Gear Engine Cylinder Lawn mower
Allett Kensington 17” 43cm QC QX Aerator cassette. Fits Atco Balmoral etc
Atco Balmoral 14S Petrol Cylinder Self-Propelled Lawn Mower with Rear Roller
2019 Allett Kensington 17” 43cm QC QX Dethatcher cassette. Fits Atco Balmoral
