Examples of the type
Private collection
1920-Feb-06 – (en) with red underprint letterSignatures: RH, OG, OS₁, KL, KG, CK, PS, AB, BB, OS₂(en) with red underprint letter
127 × 84 mm
1920-Feb-06 – (en) with red underprint letterSignatures: RH, OG, OS₁, KL, KG, CK, PS, AB, BB, OS₂(en) with red underprint letter
127 × 84 mm
Katz Auction 183 Lot 1132