This lamp's strange markings and "Frostburg" inscription indicate that it was made by Frederick Zais of Frostburg, Maryland around the end of the 19th century. Zais was known for his lamps mysterious markings. His trademark was an oval with Frostburg stamped onto the lower interior of the oval. Strange, hieroglyphic markings were then stamped into the lamp on the upper interior of the oval. These markings may have been a letter-code for which only Zais had the key.
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