First Day Of Issue Motorcycle Stamps Envelopes

H i..I have 2 1st day issue stamped envelopes with motorcycle themes. one is a 1913 Pope 5 cent coil stamp marked San Fransisco. CA., Oct. 10, 1983, transportation series 1983. The other is marked Westerville OH.Aug. 16 1990. Heritage Museum Station. It has a picture of a 1920's or 1930's motorcyclist on the left side, looking at a sign and underneath it says " I must consult my attorney ". On the right side there is the name of Attorney Leland Munroe, Mulloy & Montague, one state st., Boston, Ma w/phone #'s. Found the Pope in a couple places on e-bay w/ prices from a few $ to much more. The Wesreville I found nothing. Anyone know about these and what the realistic value of each would be ? Thanks, John

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Can you post up a photo of the covers? You're description doesn't really give the detail we need.

Photos Please.

John, the 5 cent Pope price range is correct. An FDC with just a stamp runs around 2 or 3 dollars. If the stamp on the cover is a PNC (Plate Number Coil) it runs much higher. Possible numbers are 1, 2, 3 & 4. Also, the type of cover makes a diefference.
Your other cover I can not help you with,

Peter