Lionel Whistle Tender

Here's a Lionel whistle tender up for grabs.I bought it in a boxed lot about 8 years ago with a Lionel 221 locomotive and since it was the wrong tender for the locomotive I bought the correct one off ebay for it and just ran this one behind various locomotives.I believe it's a 671W,There are no markings on it.I removed the shell with a small magnetic tip screwdriver to provide a better view of the whistle mechanism.Some lay flat but this one stands upright.The number on the underside of the shell is 1664T-4.It has a electric coil coupler.There are no cracks or chips on the shell and no rust on the frame.Overall length is 8 1/2 inches from tongue to coupler.Thanks.