Whirlpool LDA5800 handle
That must be a replacement handle for a metal one that broke off, which would indicate the washer was built slightly before the dryer next to it. While the dryer has the plastic handle, I am pretty certain the washer did not, otherwise you would see a hole in the lid where it should have been. 1976/77, when these models were being sold, was when Whirlpool was changing over to the plastic handles. Nice set.