Dating Antique Ammo Boxes.

[UpperTully]

I stumbled on a several large boxes of old ammo that came from the estate of an old duck hunter that recently passed away. Some of it dates back 75 years or more that I've confirmed. I am having trouble dating some of them though. I was wondering if some of ya'll can help putting a date on a few of these or point me in the right direction. Any help would be appreciated.

First up is this box of Peters Dupont No.120 12ga 1oz rifled slug with blue paper hull. I've seen photos of them while performing a Google Search but I can't find what years they were manufactured.



Speer in 35 Newton



Speer in 30 Newton

 

[brass magnet]

Never knew there was a 30 Newton, talked to mom yesterday and she found some old bullet boxes and wondered if I wanted them.......YEAH
wikipedia said it should not be confused with the 30 Belted Newton,......OK

 

[UpperTully]

I'd never heard of the Newton rounds until I picked up this stuff

 

[Wobblyshot1]

Pretty cool.