two frogs with later added straps in AC310 style. these are only examples...serval can be found also AC311 style..

1= frog of 1936 with a strap with feldgrey painted steel studf

2= frog of 1918. former 98/05 frog. added strap with steel stud.

P1040397.JPG (62.51 KB, 174 downloads)