German Reichsbanknote Underprint Letters

I noticed a few days ago that there are varieties among the Reichsbanknoten in the series P#20-46 and P#63-73.

They have underprint letters (but some without) eg.



Does anyone have a complete list of them? Does the Rosenberg catalog list them?

This is what I have gleaned from illustrations on the internet and some from my collection.

10 Mark 1920 D #67a
20 Mark 1906 I #25a
20 Mark 1906 B/M/R #25b
20 Mark 1907 E/T #28
20 Mark 1908 K #31
20 Mark 1909 P/S #37
20 Mark 1910 P/V #40a
20 Mark 1910 P/R/X #40b
20 Mark 1910 E #40c
20 Mark 1914 E #46a
20 Mark 1914 A/H/L #46b
50 Mark 1906 Y #26a
50 Mark 1906 M #26b
50 Mark 1907 D #29
50 Mark 1908 R #32
50 Mark 1910 A/K/T #41
50 Mark 1920 X #68
100 Mark 1898 F #20a
100 Mark 1903 N #22
100 Mark 1905 S #24a
100 Mark 1905 'U #24b
100 Mark 1907 X #30
100 Mark 1908 D/Q #33a
100 Mark 1908 E/G/K #34
100 Mark 1908 M #35
100 Mark 1909 M #38
100 Mark 1910 M #42[1]
100 Mark 1910 M #42[2]
100 Mark 1910 M #43
100 Mark 1920 E/G/Q #69a
100 Mark 1920 M/O/X #69b
500 Mark 1922 A #73
1000 Mark 1898 A #21
1000 Mark 1903 B/S #23
1000 Mark 1906 W #27
1000 Mark 1908 M #36
1000 Mark 1909 P #39
1000 Mark 1910 N #44a
1000 Mark 1910 O/T #44b
1000 Mark 1910 E/G #45a
1000 Mark 1910 G/H #45b
10,000 Mark 1922 F/H/J #70
10,000 Mark 1922 E #71