This iconic lantern was made by Beistle in 1930-31 in two sizes: this 12" version and an 8" version. The latter is marginally harder to find. Overall, the condition on this lantern is solid, slightly better than the one sold earlier this month by the same seller. That one fetched $586.50. It seems logical that this one will end around the same price. This lantern in perfect condition typically brings between $700-800.
02/27 Update: This second of two lanterns brought $860.00 for reasons that I'll have to attribute to the vagaries of Ebay!