In Finnish these are almost invariably called ‘korsu’ - which kind of means a ‘dugout’ or ‘shelter’ - it is not exactly the same but close enough hopefully. Though ‘korsu’ is more of a shelter which may be fully underground, or partially above the ground.
Also images linked are from the SA-kuva archives and do have their terms of service. And i only provide links to the low resolution pictures. Numbers are archive number references to the sa-kuva.fi archive if you want to see the metadata or download the high-resolution image
So… Let’s start with a highlight reel (pun intended) of a dugout movie theater. Archive marks it as having been located at ‘Saravaara’ (located at the front line near Medvezhyegorsk)
- Image 147837: View from towards the screen
- Image 147838: View from the screen
- Image 147839: Separate viewing ‘box’
- Image 147840: Ticket selling booth or cash register
- Images 147841 - 147843 few more about lighting, seats, doors
Few images which are marked as having been taken from the ‘korsu village’ of the HQ of the 6th Corps (VI AKE:n korsukylä). So probably not exactly on the frontline… Image are noted as having been taken at Nurmoila on 1942.02.20
- Image 73455: The guesthouse
- Image 73457: The porch of the guesthouse
- Image 73471: Door of the sauna
- Image 73474: Entrance to a korsu, with nameplates, mailboxes and all
- Images 73455 - 73493 are all of that area.
Finnish battalion command post - marked as been located just 300 m from the frontlines. Location: Rukajärvi, picture taken 1942.03.22
- Image 79234: Battalion command post
Korsu contests were occasionally arranged -
- Image 110953: Communications unit korsu - Svir front, 30th Infantry Regiment (JR 30), 1942.09.28
- Image 110955: Arched entrance to a patio of a korsu - Svir front, 30th Infantry Regiment (JR 30), 1942.09.28
Other sections which might be interest: Uutulinna pictures (80317 - 80324), Pajari’s command post (111172 - 111175)
Of course these are the exceptions and not the rule but still… what do you think of these?
EDIT: Terms of service are in the sa-kuva.fi archives themselves: Start page