I've read that the 5107P appeared in the 2004-2005 catalog and the 2005-2006 catalog, but not thereafter. I don't know the publication dates of the catalogs.
On March 17, 2006, a reliable source posted that the 5107P had been officially discontinued.
Park




I was just checked the paperwork and determined that my 5107P has a 315 movement and was retailed by Wempe on April 13, 2006.
Also, my notes from when I was searching for a 5107P indicate that each of those I located for sale had a 315 movement.
I have a hunch yours is an unusual example.
Park
