1950 RPO WT-757 “From Sask Wain & Ed” straightline.

1950 Straightline RPO W-757 “From Sask. Wain & Ed RPO”., New earliest reported date. (JAN 17 50). RF “F”.

and RPO WT-755.02 “Sask. Wain & Edm RPO / No. 2” (12 JAN 17 50) on registered letter bill, RF “A”.