Identification guide for designs of United States stamped envelopes, wrappers, and letter sheets one and six-tenths cents
There is only 1 design of an indicium whose face value is one and six-tenths cents. It is:
Liberty Bell
design U104
You have identified design #U104, printed in orange on white paper and diagnostic for
Scott #U548A; or printed in brown (erroneously) on white paper and diagnostic for Scott #548Ab (rare).