Not familiar with this British company. These are NOS, England made bulbs, no number on bulb just says British, 12v, 35/36 w, one of the bulbs says prefocused. No. On box end says 10-157, I don’t know if it’s a Samsull part number or refers to something else,I could not find any information on this Company or bulb other than what’s in the box. Been stored for 40+years, left over inventory of old mechanic/motorcycle shop, box contains 8 bulbs