Here is what looks to me to be a Mason Premiers Mallard Drake Decoy.
I am not an expert and do not have much knowledge about antique decoys but what I have researched tells me that the scrolled face separating the bill from the face, the way in which this decoy is painted, the glass eye and what appears to be a hollowed out body indicate to me that might be a Mason. If anyone has any information otherwise please advise. I will be listing two nearly identical decoys. This one has a loose neck. The second listing the neck is more secure.
17 in long and 7 in tall to the top of the head and around 5 1/2 in wide.
This one weighs 1 lb 13 oz.

On May-17-17 at 18:51:15 PDT, seller added the following information:

I have been told that both of the listing I have for these aremason challenge grade hollow drake mallards.

On May-17-17 at 20:15:37 PDT, seller added the following information:

Update!!You have challenge grade hollow with Premier paint. Looks all original.

On May-19-17 at 06:36:42 PDT, seller added the following information:

Added a picture of both ducks side by side looking down at them.

On May-19-17 at 20:22:24 PDT, seller added the following information:

Update. Hello, these are mason challenge grade hollow drake mallards. They are quite valuable if the paint is original and it looks very good to me. I have a pair of these in my collection.