Another purchase I got awhile back was this Aluma-Form 35KV insulator. It is pictured beside one of my Hendrix 35KV plastic insulators. It is similar to Hendrix's design with little differences. Below is pictured the Aluma-Form companys marking. A stylized AF. Aluma-Form have been around since the mid 1800's but really came to being during WW2 when they were part of Allied Insulators Co.