sorry to bumb in like this ,,, (aim almost never on this forum)
but this ek is interesting ,, a hard nut so to speak ...
but I do have a price list from Deutscher offiziers verein from 1902 ,
were they advertise with all sorts off 1870 rewards ,,including ek1 and 2
(so aim always on the watch fore ek's that maybe, can be from that time )
just wanted you all to know that there are also 1902 period ek1 1870 and 2's
al do I don't think its NOT up to the quality DOV provided to its members in general in those day's
but who knows what more jewellers where producing rewards in those day's
( the soldering wood be interesting to see )
hope its no useless info
regards kay