[Saxman]

Early models did come with a flat spring.

 

[P3AT]

Spring, probably. Engraving, aftermarket.

Pat

 

[Steve W]

That's an after market engraving.

 

[Deadpair50]

I would agree with everyone else, it appears to be aftermarket. However I think it is a nice touch.

 

[dfwip9x]

What is the serial number on the trigger?

 

[JussBad]

30X

 

[dfwip9x]

I have an early factory engraved trigger (400's) and it is a scrolling pattern. I have not seen any early Perazzi trigger with what you are showing. I agree with Steve.
Paul