Hi Harry, Welcome to the forum! To be of much help to you we need to know the serial number, including suffix letter, and to see photos. The small parts (trigger, thumb safety, take-down lever and magazine release catch) on Lugers prior to mid 1937 were heat treated a light straw color. After mid 1937 they were blued like the rest of the gun.
I hope this helps some.
Regards, Norm
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