Hi,
This a Norwegian holster allright. They cut the original straps and added the 4 holes to accomodate the web belt strap.
The Norwegians used the P08 and it's holster well into the 1970s and they were sold off a number of years ago. Many were refitted with German-style straps and many are still offered for sale throughout Europe. Value between 60 and 120 Euros.
I'd personally go for an unmessed-with "Norwegian style" , including the original web belt hook.
ps. the Norwegians were the reason that both the P08 and the P08 holster received NATO parts numbers.