The pea green blc Kommandant 8x60 and blc 7x50 are two binoculars which were made for submarine service and no other arm.
Did the set you have actually see service difficult to be 100% unless you know the history of the ownership.
See this set closed at £2400 odd. having said that it was in very good order and it would be a once in alife time buy.
Given a choice between in and a RK and I would take the binocular , and that is honest.
Some day , well i have already seen a set described as being " Afrika Corp U-boat binoculars" , now that covers every base on ebay
Attached jpeg 9 size is not too good , shows the 7x50 version , a good bit less expensive than the 8x.
Weight wise the 8x must have been an absolute tramp to use on a moving deck.