Mike,
It is one of the Sauer model 3000 type guns in 16 ga and 7x57R. I'm not sure if it has been modified or not and the descriptions on Simpsons rarely go into too much detail. I suppose I'll need to wait until I get it in my hands before I will even know if I'll be keeping it, let alone seeking out an Einstecklauf to be fitted in it. I also have a lot more research to do into the world of drillings, but I felt after watching them sell from various retailers over the last few years that this seemed a decent price. I've been wrong before though... I'll post pictures of it when I receive it and if I decide to keep it.
