It's a Fulton winch
But, this is a very special winch that you don't just get anywhere as it has a brake mechanism that prevents the keel from dropping as you lower the keel. Without this break, you'd break your arm as the winch handle quickly spun.You can probably get a replacement handle from Catalina Direct. However, as I understand, there are at least two styles for this handle. So even though you specify a '74 boat, you may get the wrong handle.Nevertheless, you would probably be best springing for a new winch in that the newer ones have a larger drum diameter that greatly improves the winch action.