As far as I can tell 1914-1918 were almost the same as the 1911-1913 driveshaft with the exception that they were now a 1 piece U-joint ball and a pressed steel mounting ring, instead of the previous 2 piece configuration and cast mounting ring. Sometime in either 1919-1921 they went to the captured ball bearing instead of the loose balls, the captured was sandwiched between two races, held in place by the same internal snap ring with the thrust washer (distance plate) inside the snap ring as before. In 1922-1927 things changed slightly again, the spool bolts were now open and the spool was no longer cast but forged vanadium steel, this gave the driveshaft lighter weight at the pinion joint, higher tensile strength and better durability than previous configurations.
And here I thought there were only 2 of these assemblies, now I come to find out there are 5...yeah, well, fun never quits ya know!
