Your example has a wavy line killer (cancel) and a circular postmark. The year date line appears alone at the bottom of the circular postmark. There are 6 or fewer wavy bars.
Question: Are there exactly 6 wavy bars are in the killer?
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Bob Swanson's Machine Cancel Page
Bob Swanson's Postal History Page
Updated Sun Feb 24 10:13:17 MST 2019