German banknotes : 1914 - 48 issues 02

At the beginning of the second World War, a lot of new banknotes were printed in th German Empire.
In the 'first issue'  of August 1914, a 5, 20 and 50 Mark banknote was printed.
They all have "5 August 1914" as printing date.
Yet there are differences in the notes.

5 Mark

KM 47 b front

KM 47 b front detail

KM 47 b back

This note comes in 3 variations :
# 47a (5-8-14) with 6 digit serial n°
# 47b (5-8-14) with 7 digit serial n°
# 47c (5-8-14) with 8 digit serial n°

KM 47 b serial number

KM 47a is the most valuable, 47b and 47c have the same value.

20 Mark
(not yet in my collection)

50 Mark

KM 49 front

all notes in this set bare the date 5. August 1914

detail of the front, watermark is visible

This note comes in 2 variations :
# 49a (5-8-14) with 6 digit serial n°
# 49b (5-8-14) with 7 digit serial n°

KM 49a - back side

KM 49a back side - detail with 'Germany' symbol of the German Empire

KM 49a - 6 digit in serial n°

KM 49b - 7 digits in serial n°

Value of the 49a in UNC condition is almost 10 times the value of the 49b.
In used condition, both notes are equaly priced.