1920 Red Cross 40-55k printed on reverse of Western Army 10Mk banknotes, in part sheet of 40+ showing 4 comp banknotes on reverse. VF MNH. Mi 52z, SG 51. Spectacular & rare. (Image1)

Estimate AU$300

1920 Independence surch 30R/1R part sheet of 30 with margins 3 sides, printed on reverse of unfinished banknotes, 4 full & 5 partial notes. Superb U/CTO 'Riga 23.V.21' cds. SG 66 cat £195++, Mi 57 cat €150++, plus premium for part sheet. Purchased by vendor in 1990s for DM400 = A$330. (P) (Image1)

Estimate AU$350

1776 Folded letter wrapper endorsed on reverse 'Herman Fromholz Riga 21 Jan 1776', with boxed 'RIGA' h/s. To Pernau. VF. Purchased by vendor in 1990s for DM300 = A$220. (Image1)

Estimate AU$150

1933 Airmen Fund memorials set 2-52s to 20-70s perf & imperf, plus Arms 2s (3), tied to reg cover by 'Riga 5 IV 33' cds, with h/s reg label/cachet. To Switzerland, with Bern arrival b/s. VF. SG 231-4 A & B cat £240+, Mi 215-18 A & B cat €200+, plus premium on cover. Purchased by vendor in 1990s for DM620 = A$520. (P) (Image1)

Estimate AU$450

1933 Airmen Fund planes set 8-68s to 40-190s, plus TB surch (9) & 9 others -some on reverse, tied to Air Express registered cover by 'Riga-Lidpasts 10 7 37' pictorial cds, with h/s reg label/cachet. To Germany, Berlin b/s. VF. SG 243-6A etc cat £425, Mi 228-31B cat €375, both as loose stamps, plus premium on cover. (P) (Image1)

Estimate AU$700

1933 Airmen Fund planes set 8-68s to 40-190s perf & imperf, tied to reg express airmail cover 'Riga 29 VI 39' cds, with h/s reg label/cachet, air & express labels, plus TB Surch on reverse 9 on 6-2s (2) & 17 on 2-4s blk of 4. To Switzerland. VF. SG 243-6 A & B cat £850++, Mi 228-31 A & B cat €700++ as loose stamps, plus premium on cover. Purchased by vendor in 1990s for DM2000 = A$1700. Spectacular & very rare cover. (P) (Image1)

Estimate AU$1,500