Derek, Here is some history on the unit. The unit wasn't exactly made up from these Imperial units, but honors them as being derived from, or in direct lineage of these units. The 11th J.R. was part of the 4th Reichswehr Division.
11. (Sächsisches) Infanterie-Regiment
1st and 2nd Companies: Kgl. Sächs. 10. Infanterie-Regiment Nr.134
3rd and 4th Companies: Kgl. Sächs. 9. Infanterie-Regiment Nr.133
5th and 8th Companies: Kgl. Sächs. 5. Infanterie-Regiment Kronprinz Nr.104
6th Company: Kgl. Sächs. 6. Infanterie-Regiment König Wilhelm II. von Württemberg Nr.105
7th Company: Kgl. Sächs. 15. Infanterie-Regiment Nr.181
9th Company: Kgl. Sächs. 7. Infanterie-Regiment König Georg Nr.106
10th and 13th Companies: Kgl. Sächs. 2. Pionier-Bataillon Nr.22
11th and 12th Companies: Kgl. Sächs. 8. Infanterie-Regiment Prinz Johann Georg Nr.107
12th Company: Kgl. Sächs. Maschinengewehr-Abteilung Nr.8
14th and 15th Companies: Kgl. Sächs. 11. Infanterie-Regiment Nr.139
16th Company: Kgl. Sächs. 14. Infanterie-Regiment Nr.179
A very nice Reichswehr Infantry marked Luger.
Ron