She was launched on 7 July 1938 Gyller had four torpedo tubes , instead of the two which were standard in the rest of her class .
Gyller was built at Karljohansvern naval shipyard and had yard number 125 .
Gyller was launched on 7 July 1938 Gyller had four torpedo tubes , instead of the two which were standard in the rest of Gyller 's class .
Gyller was built at Karljohansvern naval shipyard and had yard number 125 .