11 checker? rolled tread-plates for working floor

11 [checker?] rolled tread-plates for working floor, and a disc of plate to go under steam valve bonnet

Details

Category:
Motive Power
Object Number:
1969-2/39
Measurements:
overall: 80 mm x 1700 mm x 915 mm,
type:
tread plates
credit:
British Railways, Western