Info on j c Higgins model 100 16gu side by side made by aya of Spain?

Built in 1954 and '55 only. High quality Winchester model 21 clone. All have ejectors, single non-selective trigger, rust blued barrels, beavertail forearm and blued frame that I have seen. They were built in 12, 20 and 16 gauge. Have been selling from $350.00 to $500.00 lately.