230 OM in a 10 gold pin T0-100-10 case. No Info on this one, a bit of a rare one (hence default stopgap pricing). Please call if you know what it is. It may be a ring modulator, or just a simple op-amp. Status: NOS ( New Old Stock) 1970's ****update ( thanks, Alex H. in Holland 3-3-2019 ...... this is a pre-production Philips IC **** other OM items can be seen at : https://www.circuitsonline.net/forum/view/113864/1