Korean War Era North Korean Insignia

[checkit]

I've been having a heck of a time finding reference information on North Korean insignia from the Korean War era. Here are a few items I have from a large grouping.

Thanks in advance for any information you can provide.

[checkit]

2

[checkit]

Hello All - Still looking for some learned opinions on these patches.

[vacollector]

They look like post war Nork Navalyard patches the front writing on the patch says " Shipbuilding " in korean.

[checkit]

Many thanks for the great information.