Sorry... thread drift on my own thread! LERK is a commonly used shorthand for "Large Ejector Rod Knob." This refers to the style of ejector rod used prior to WW II then for a very short while after in order to use up old stock parts. In the early Post-War K-frame Masterpiece series, this feature has a special cachet as it demonstrates very early production and is pretty rare.

Of course this whole thing was left behind as I discussed the (much) later K-32 barrel I had acquired and having it built into a whole gun, an homage if you will, of the late Model 16-3 version of the K-32 series.

HTH~Froggie