This is a toby mug which likely dates back to the 1960's as the manufacturer went out of business in 1968.
"FALSTAFF" is etched into the rear lower surface near the base.
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This mug has no chips, cracks, scratches, stains or crazing.
The interior surface is predominantly a cream color which leans towards yellow in spots. There are a few random dark marks on the interior walls from the manufacturing process.
The interior and exterior surface displays micro crazing when inspected with a magnifying lens. In normal viewing it's not very noticeable.