Look at the patent date.
I have several GEMs and Evereadys and all of them with patent dates 1901 or later take today's SE blades. (All my 1901 are actually 1900/1901.) Certainly all the "1912" and later models work with today's SE blades.
I have one with 1898/1900 patent dates and another even older (Pat Pending). These only take the wedge shaped blades. I think this is by design. Perhaps SE blade similar to todays didn't even exist at the time. On the 1898/1900 it may be that the little tabs that hold the blade back are just too worn down.
I have a French made PAX (no patent date shown but I guess somewhere near 1900) which seems like it should take a standard SE blade but I just can't get the blade to stay put. The tabs seem OK but the blade wants to move around sideways and it slips off the tabs.
Last edited by Bertilak; 10-03-2010 at 10:31 AM.
Somebody's nuts. I don't know whether it's me or them, but somebody is definitely nuts. I just wished I knew, so I'd know, you know?