I am finally getting around to looking at thousands of used Canada Small Queens that I have hoarded over many years! Up until now I have mainly focused on Mint stamps, so looking at cancellations is new to me.
Can anyone provide me with some information on what the letters mean within the following flag cancellations? (F, E, A)
Is there are good reference site, or book, that addresses the various cancellations in the Small Queen period?
