I just purchased a large amount of sterling flatware, and some of it is Towle, Rambler Rose. On most of the pieces, the marks read (lion T) Towle Sterling Pat. 1937 Rambler Rose. But on a few of them, the patent date is not there. Does this indicate a reproduction, a later production, or what? Thanks for any help you can provide. By the way, I am new to the forums, so I hope I posted this in the right area.