Steuben Pink Swans

These lovely pink swans were in my mother's collection. When she passed away in 2009, I inherited them. I don't know where or when she acquired them. The taller one is 6 1/2" high, the other one is 6" high. There is "STEUBEN" etched on the bottom of each. I tried to get a photo of the bottom, but could not get anything in focus. I have tried to get some information these cuties, but haven't had any luck on the internet searching "Steuben pink swans".

Does anyone here know about these? Approx. time they were made? Any value estimates?

I don't think I could part with them, as they remind me of my mom. She loved them!