Nice medal bar. Seem to be many of the 10 and 15 year in various groupings. I have a couple or three, usually associated with a GPB. Here are a couple. The first is the medal bar of SS-OGF Fritz Weitzel shown in the photo of him wearing it and his Italian award as a Grand Officer of the Order of Sts. Maurice and Lazarus. The cased PPK was a birthday present to him from RFSS Himmler in 1939 and is so noted on the inscription plate. Sadly, no GPB. According to party documentation, it was sent to his family but lost.
The second is a short medal bar of 10 and 15 year NSDAP Long Service belonging to SS-SF and Stellenleiter der Reichsleitung Anton Hartmann, along with the accompanying ribbon bar and his small GPB shown in the photo of him from his SS officer file.