Mike, Nice find, any arched "Oneida Community" or "Kenwood, NY" stamped springs are hard to find. For those that don't know, the arched "Oneida Community" is the Canadian version of the arched "Kenwood. N.Y." stamp. Oneida Community hade a trap factory in Canada as well as the U.S. Hawley & Norton springs are not marked. If you find a spring stamp whether it is arched or strait lined, it is a Newhouse spring. In fact that is what the first line of the stamp says: "S. Newhouse". The hole idea of the Hawley & Norton trap brand was to make a quality trap that was less expensive. Newhouse springs are better springs and there for more expensive to produce. Oneida Community made both Newhouse and Hawley & Norton traps and they could not afford to put Newhouse springs on a trap and sell it for less money. That said, I do believe that when the need arose, they would use Newhouse springs to fill an order if they did not have the springs they needed but I do not think that this was a common practice. Us trappers modify traps all the time, if the spring broke or got week they would not through the trap out, they changed the spring. Either way your trap is a great find. As for Hawley & Norton pan stamps, the first model just had "N.Y." at the bottom of the pan. The second pan had I believe "Community, N.Y.". The third pan "Oneida, N.Y.". The forth "Kenwood, N.Y." Fifth pan "Oneida Community, N.Y.". All of these cast pans, then they went to riveted sheet metal pans marked "Oneida Community. N.Y." and then "Animal Trap Company". That is for the U.S. made Hawley & Norton traps. There are other versions, latter ones with patent dates.