how can you tell if a trigger is WWII production?

[kicker]

how can you tell if a trigger is WWII production? Is there any proof marks to look for or a picture guild. any information is welcomed.

[dfariswheel]

I'm not an expert but there are no marks I know of on Colt triggers, possibly on non-Colt, but I don't think so.
WWII triggers will be either milled steel with checkering and blued, or stamped steel with pressed-in checkering and parkerized.

[bofg]

I am guessing you are asking about 1911A1's, one of the sites I like is Coolgunsite, they have a lot of good photos and details about all the different parts for the 1911A1. If you follow this link then click on ID Pages & then Triggers you will find different examples;
http://www.coolgunsite.com/

[Milsurp_Collector]

The trigger bow was modified after September 28, 1943. A cutout was added to prevent interference with the sear.



See http://www.coolgunsite.com/pistols/parts/triggers.htm