2 casement window cranks have become stripped (or something) and are no longer functional. I need help in assessing which part(s) to buy.
#'s on the inside of the present handle are 45012 / US patent #4.083.804 / Canadian Patent 1979.
I would need new handles and the crank operator mechanisms - can you tell me what to buy?
I've attached pictures that I hope will help. thanks...Ruth