I like calgarchefs idea. waxing would be better. It seals better. Oil just conditions. Call a fur trade restoration curator at the Alberta royal museum in Edmonton or Glenbow museum in Calgary for the best advice.
Found this info for you...
excerpt from this ebook:
http://www.gutenberg.org/files/34229...9-h.htm#pic079
Oneida jump traps.
"The sizes adapted for the various animals are: No. 0, rat and gopher; No. 1, muskrat; No. 2, mink; No. 2 1/2, coon or skunk; No. 12 , same as 2 1/2, with teeth; No. 3, fox or otter; No. 13, same as No. 3, with teeth; No. 4, otter or wild cat; No. 14, same as No. 4, with teeth."
Your No.12 was used for coon and skunk. A common trap back in the day.
This is from another site:
"In an agreement between Blake, Lamb & Company and Oneida Community, B.L. & Co. made a line of Newhouse traps and Oneida Community made a line of jump traps, called "Star", in 1895. Star traps had three stars around the top of the pan and came in sizes #0, #1, #2, #2 1/2, #3, and #4, and were either single or double under spring types.
By 1904, the solid pan type was introduced, also in single and double under springs, sizes #0 through #4 and in sizes #12 through #14 which had teeth. By 1910, the double under spring was discontinued and the "V" was cut into the pan."