Great Post Card on ebay various projectiles

[Gspragge]

Perhaps something interesting is shown.

 

[peteblight]

Can anyone tell me what the squarish item on the right hand side is?

A friend has a very similar looking item. I will post some pictures tomorrow.

Cheers

Pete

 

[batonroundcollector]

looks like a trench periscope??

 

[US-Subs]

Squarish? Lucky you don't work for a technical organization.