Whatizzit? A Savage 1907 .32 Pistol, or a Savage 1917? Or is it both?

What we have here is a Savage .32ACP semi-auto pistol. But is it the Model 1907, or the Model 1917? Or is it somewhere in between, a little of both? That's what we concluded at the gun shop where I work.

Here's the Bluebook listing and a photo of the Model 1907:

MODEL 1907 AUTO PISTOL

- .32 ACP or .380 ACP cal., 9 (.380 ACP) or 10 (.32 ACP) shot mag., 3 13/16 (.32 ACP) or 4 5/16 (.380 ACP) in. barrel, blue, fixed sights, metal (early mfg. in .32 ACP only until ser. no. 10,980) or hard rubber grips, exposed cocking piece. Mfg. 1910-17.

And here's the Bluebook listing and a photo of the Model 1917.

MODEL 1917 AUTOMATIC

- similar to Model 1907, with spur cocking piece and trapezoidal grips. Mfg. 1920-28.

Now compare those two photos and the descriptions to our Savage .32. Ours has the spur cocking piece and the close-together slide serrations of the 1917, but lacks the trapezoidal grips. It has the normal-shaped grip of the 1907. It's not one or the other, but a combination of the two, so we called it a Savage Arms Model 1907/1917 .32 ACP/7.65mm Single-Action Semi-Auto Pistol.

And here's the kicker. If you use the link above to go to our gunbroker auction, you'll see it comes with a genuine Savage 1917 box with label and factory papers. The previous owner who sold it to us certainly thought it was a Model 1917.  Whatever it is, some Savage collector will get an oddity.