The 1931 Admiral Provisional (Scott 184) was issued on June 24th 1931. No cachets are known for that issue. The few FDCs prepared are amongst the rarest Canadian FDCs of the period.

The 1932 Arch (or Leaf) Issue Provisional consisting of a 2c Surchage on a 3c stamp is covered by two cachets and was issued on June 21 1932.

The Cachet on the Left is by Roessler. The one on the right is by Hacker and is his first cachet.
 
 

The Airmail C3 has the following know cachets. The one on the left appear to be the most frequently encountered. The one on the right is by AC Roessler.

The one in the middle I havent yet identified.
   

A true rarity and Gem: Hand Drawn cachets by Ralph Dyer. Probably unique.