1903, Overprints on India, lot of six stamps mainly showing particularities of overprint: SG 3 used, 5b used, 25 with one inverted year date figure used, 30 with "Thin I" and "Large L" mint, O6 with "Broken S in BRITISH" and O6 with distinctive "Dropped E" mint. All signed Dr.Knopke.

1903, Overprints on India, collection of apprx. 70 mainly used stamps, comprising e.g. SG 22/24, some are signed Dr.Knopke.

1904, Overprints on India, lot of three items: SG 24 used on piece with clear strike of field post c.d.s. "BASE OFFICE 1 SEP 4" (slight faults); SG 19+20 on registered cover to Holland; SG 26/30 on registered cover to Germany.