Thank you ridewv. Your value info from a more recent than my latest version (15yrs old) of BBoGV is very helpful.
I'm no expert on 41s either but have seen an extended sight version, which is actually that. The front sight sits about 1.5" fwd from the front of the barrel on what looks like an extension to a rib on a shotgun bbl. One can be seen on the pistol in this ad on the gb site:
http://www.gunbroker.com/item/610692315 . Sounds like you have a nice early 41 too. Thanks again for value info.