Jos skirtingos,bet KM vienodas?

> Jos skirtingos,bet KM vienodas?

> Coins are different, but KM is the same?

Second variant with date in the middle and GF mint mark is not in Krauze. Krauze tells that varieties exists, but it is unclear if they consider middle date variety under same KM. 1671 variety with middle date exists too.

Some online shop identified it as v.Schrötter 1254.

Friedrich Freiherr von Schrötter; 1913. Die Münzen Friedrich Wilhelms des Grossen Kurfürsten und Friedrichs III. von Brandenburg. Paul Parey, Berlin, Germany.

Other id is Bahrfeldt 434

Emil Bahrfeldt. Das Münzwesen der Mark Brandenburg. Verlag von W. H. Kühl, Berlin, Germany (3 volumes).

1670 with date on top is Schrötter 1231.

You would need those reference books to check. Consistency of middle age minting is such that some reference books stop counting variations.

The v. Schr. references for this type, minted in Krossen, are 1220 (1669) to 1270 (1674). From no. 1244 and onwards (at the end of 1670) he notes that the date (16=70) is from now on “neben dem Apfel”; that is, surrounding the imperial orb. There are then further variations in whether or not the date is straight or curved, if the sides of the coat of arms are curved, etc.

Krause may have considered these changes as part of the known varieties given that KM 372 covers 1669 to 1674 GF. It is unclear why they included 1668 (v. Schr. 1212-1219) though, since the reverse is quite different.

Find a copy of Brandenburg-preußische Münzprägungen by E. Neumann; it makes it a lot easier to navigate the von Schrötter variations.