I have been observing your camera in detail and drew my attention some details that differs from original Leicas IAs. Notice the number of screws attached on the front side of the top plate, normally 1 not 3, the focal distance displayed on cm not in mm and the focus scale that also differs from IAs. I recommend you to contact Leica forums, they could help you to authenticate your camera as they did with mine. Good luck with it. Concerning of the chrome/Nickel finish it is pretty sure it was made by somebody different from Leica. Leica did not chrome this camera as an upgrade.
