I believe a Block and Tackel type balance
A contractor from Virginia Beach says:
September 27, 2016
I need help to identify if this is a block and tackle balance and how to purchase
Tom from SWISCO responded:
September 30, 2016
Take a look at our Series 795 channel balance, this may be what you want. Keep in mind it comes with a 1-1/4" wide shoe and installs at the top with a screw tab, not a hook.