Chris, well, this is an interesting one. Either previously reblued at one time or very worn (light markings).
A 1910 is very rare in itself (17k estimated made, however, the a suffix would be incorrect, should be "b", "c" or "d".
Your knobbie on the left, well, what the hell is that? (note, read over your thingy on the safety thingy and now understand)
Are you Positive about the caliber? i.e, that it is not 9mm? Note, it appears to have 8,xx (the xx being eitehr 8,82 or 8,83, 8,84 etc., the lands to lands measurement) If so, then the barrel is actually 9mm, and may have been lined as a 7.65mm (30 luger), I have a 1913 that is just like that, almost impossible to tell it has been relined...
From your angle, what does the unit marking look like on the front grip strap?
And welcome to the forum, and for the time being, don't change it in any way!
Ed