96.323.837 illuminated push button switch for use with 17.4 x 17.4mm square keycaps made by eao (Switzerland) These were very popular within the high end music industry. Download eao 96 series switch & key caps datasheet: Status: NOS (New Old Stock) Please note : this is the switch only and does not include any keycap - please see related products tab above for the many keycap options. RoHS Complioant : YES