Mullard OC170 germanium PNP alloy junction transistor

Mullard OC170 germanium PNP alloy junction transistor The OC170 is an alloy diffused germanium PNP transistor. It has a breakdown voltage of about 20V and a maximum collector current of 10mA. Ft is about 60MHz. Beta is typically 150. The OC170 was developed by Philips and introduced in the late 1950s.
 * 1) http://w140.com/OC170.pdf
 * 2) http://w140.com/tekwiki/wiki/OC170
 * 3) https://sites.google.com/site/transistorhistory/Home/european-semiconductor-manufacturers/philips
 * 4) https://reverb.com/item/502396-1958-mullard-gold-saucer-oc44-pnp-germanium-transistors-rangemaster-pedal-kings
 * 5) https://images.search.yahoo.com/search/images;_ylt=A0LEV1oZo2lXTIQACsdXNyoA;_ylu=X3oDMTEyY3M1aWxwBGNvbG8DYmYxBHBvcwMxBHZ0aWQDVUkyQzJfMQRzZWMDc2M-?p=Mullard+OC170&fr=yset_chr_cnewtab
 * 6) https://reverb.com/item/127295-nos-new-old-stock-mullard-black-glass-oc44-pnp-germanium-transistors-tested/similar
 * 7) http://www.ebay.co.uk/sch/i.html?_nkw=mullard+oc