ULEFOS
SJK
NSTPL
EN124-2 D400

On the outer ring
D400 GJS
ULEFOS
UF 640/650
NS
EN124-2

In the lid you can see known elements from the city of Bergen: houses from the old part of Bergen (Bryggen), Bergenhus Forest, Håkonshalen - Bergen City Museum and Rosenkrantz Tower, Fløibanen cable car, Ulriksbanen aerial tramway and the television tower
The illustration is the same as the one that appears on another cover

 

GJS is a sign for Continuously Cast Spheroidal Graphite Iron - which describes a process in which the metal is continuously fed.

SjK meaning:
Sj (Støpejern): Cast iron.
K - Kulegrafittstøpejern - Iron in which the graphite occurs in the form of balls (spherules = Kuler).