The Swedes were produced in, basically, four models. Originally there was the long rifle, or model 96, and the model 94 carbine. At some point it was decided to go with one length, a short rifle, and the model 38 was the result. Some of the model 96s were arsenal converted to the model 38 barrel length. These are the model 96/38s.
The 1917 model in question would have started out as a 96 type. However, it might very well have been converted to a 96/38 before it was sporterized.
Of course, the barrel might have been shortened during the sporterizing process itself. In fact, it's not unlikely.
My battery of Swedes includes a home built scout rifle on a 94 carbine, a custom sporter on a model 38 and a mil-surp 96/38, with a 1900 Oberndorf receiver, in mint condition. I wish I had acquired more of them when they were going dirt cheap not that many years ago.