This one looked to me like an N-9 knob on ear. Date position looked right for that. Pics are not good but it looks to have XF sharpness. Some small whitish deposits on coin look like they might be removed by acetone and verdicare. https://www.ebay.com/itm/2246146631...=true&nordt=true&rt=nc&_trksid=p2047675.l2557