2 interesting bakelite B22 socket adapters

Both of these were found on Ebay recently, and are both very rare designs which I have not seen before. Both appear to be from the late 1940's, at a guess and are very well constructed, much more so than some others I have come across. Their rarity is probably due to these being more expensive models at the time, as you can see the one on the left has a long chain controlling the switch (complete with Art deco-styled "On/Off" tags) and the one on the right features two individual switches.