1918 take down lever

[DaveL]

Dwight,
I've tried to get some pics of my sideplate to no avail. My 2 cameras just won't take a good close-up. So, I'll try to describe it the best I can.
The 66 on the sideplate seams to be a different font than the 66 on the pistol itself. The sixes on the sideplate are narrower than the 6 in the serial # and the other small parts. They look to be the same height. The small parts numbers on this Luger are 64 so I have a few to compare to. The top curl of the 6 on the pistol looks like the 6 in this font that this board uses. In other words the top curl doesn't go all the way to the right side edge of the 6. On the sideplate the top curl does go all the way to the right side of the 6 and curls over on the right side. There is also the #55 stamped in the middle of the square part of the sideplate on the reverse or back side. The 55 is about half the height of the rest of the numbers. The sideplate has the trigger lever and lever pin with what you might call a detent hole for the trigger. I'm not sure what else to look for. What else do you need to venture a useful guess?
TIA
Dave