There are no maker's marks or date marks on any of them from what I can see. I have used A/F for " as found " for 50 years.
Saltburn By The Sea From WHITBY - TPO - Railway Travel Post Office Plaque #TPO19
EGTON Whitby TPO - Railway Travelling Post Office Sorting NAME Plaque #TPO3
DANBY From Whitby TPO - Railway Travelling Post Office Sorting Plaque #TPO11
London E. from Whitby TPO - Railway Travelling Post Office Sorting Plaque #TPO14
Whitby GLAISDALE TPO - Railway Travelling Post Office Plaque #TPO18
Glaisdale 1925 Railway Sidings Plan Diagram Picton to Grosmont LNER Train Line
