Can anyone id these glass lenses?

I found these lenses in a box of mixed parts, and would appreciate some help id:ing them.
They are real glass, smooth outside and frosted inside. Markings on them are "Hall no. 15043" and "L.L. 00.1706", but I fail to find references on Google.
Measurements: End to end on table appx 75mm/3", width 35mm/1.4", curve max height on table 25mm/1". Thanks in advance!

 

they likely are rear marker lenses? ...that would be on the underside of a round taillight body?

Hall Co, that must have some connection with the C.M.Hall Co, which once was a major supplier of headlights, cowl lights, and taillights, around 1930 on US cars like Chrysler made autos.

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Look like license plate light lenses, the ones that are in the taillight buckets.

 

Harley-Davidson used a lenses like that in the 50's and 60's. for license plate light in tail light housing

 

X2. Maybe a truck tail light tag light lens