The two machines for the application of postmarks, in function in independent Latvia, were used further in the soviet period 1940-1941.
In the beginning the Latvian postmarks were used, but later -from October 1940- you see the postmark changing: bilingual indication of the place and the soviet star.
According the classification of Juris Mors:
- M-SL1-A: 7 wavy lines, beginning upwards, serial A
- M-SL2-A: 7 wavy lines, beginning downwards, serial A
- M-SL3-B: 7 wavy lines, beginning downwards, serial B
- M-SL4-B: 7 wavy lines, beginning upwards, serial B
- The type on this cover, M-SL3-B, with serial Б is used 11-11-1940 until 24-12-1940, with the flag-waves first going down (for the other type -with the flag first going up: see the card at the bottom of this page).
Card, with the same machine postmark, M-SL3-B, with serial Б, but now a LPSR-postage stamp is used.
Intial the Latvian postage stamps are used, but on 21 October the first postage stamps of the Latvian Socialist Soviet Republic are issued. On these postage stamps we see the Latvian indication Latvijas PSR. The Latvian postage stamps were allowed to be used upto 20 April 1941, with the exception of the ‘Ulmanis’-stamps.
- On the other side, a nice view:
- Another card with machine-postmark, used in the LPSR-period:
This card above: Type M-SL4-B. The type with serial letter Б, used between 27-12-1940 and 14-6-1941, sub-type with the flag first going up.
The arrival-postmark of Vecmilgrāvis is still Latvian: with LATVIJA.
The picture on the other side of the card: ‘Daudz limes vārda dienā’, Happy name day.