I'm not really familiar with a Smith this early, but later ones do not have a separate sear spring. These have a Vee Main spring with the longer upper limb being the hammer spring & the shorter lower limb being the sear spring. The sear on these is mounted below the mainspring & does not engage the outer periphery of the hammer as this one does. The hammer Smith's I am familiar with are set up very much like the later hammerless guns. In short I have never seen a Smith with this sear arrangement.
