but not exactly the same.
The lugs are straighter on the ref. 6378,
which is a later version(?), and from mid 60s.
It has caliber K 1071, wellknown automatic.
Versions with and without date.
Ref. 4870 is the older one,
initially with cal. P 499,
later with, I believe cal. 1019..
Automatic also, but I haven't seen any with date..
I believe it came in the beginning of the 50s.
I also think the indexes are a little bit different.
Have a look at Antiquorum,
I know that there are examples.
Both are quite common.
Here Bill can correct me a lot,
I'm afraid, but it's something anyhow Rei