“International Labour Day on May 1st” (“五一世界勞動節”)

Northeast Directorate General of Post and Telecommunications (東北郵電管理總局)

Yang NE24-29, J.DB-39

Commemorative Issue: "International Labour Day on May 1st" ("五一世界勞動節")
All stamps of this issue shown here.
Issued:1 May 1947
Issued by:Northeast Directorate General of Post and Telecommunications (東北郵電管理總局) in Harbin (哈爾濱)
Printed by:Guangfa Printing House (哈爾濱廣發印刷所)
Print method:Lithography on silk thread paper with watermark, L11
Sheet size:10 x 9 = 90
Designer: Zhang Xiuping (張修平)
Currency:Northeast Currency (東北幣)
Valid until:8 July 1950

Perforated:

Vertical imperforated:

Imperforated stamps (on silk thread paper with watermark):

Imperforated stamps (on newsprint paper without watermark):

Imperforated stamps (on silk thread paper with watermark), proof prints:

First Day Cover (FDC):


Remarks (in general / for this issue):
– All commemorative stamp issues from Northeast are rare on commercial covers.
– Shifted perforation and large stamps with “wings” can be found commonly.
– Because of the existence of large stamps (inaccurate line perforation) and imperforated margins single “imperforated” stamps can’t be count as imperforated stamps.
– Imperforated stamps are more rare as partly perforated stamps (Yang NE24a-26a). So please be careful for altered “imperforated” stamps out of partly perforated stamps. 
– Single imperforated stamps on newsprint paper or black proof prints count as imperforated stamps because they were not produced with perforation.
– The watermark is rather big structure, so stamps without a water mark can be found commonly.
– From time to time you can see various black proof sheets on thicker newsprint paper often in reverse or inverted printing and / or in combination with different values / sets (like the one shown in Yang catalog page 118). Sometimes also printed on thick watermark paper. A valuation is hard to calculate, often the authenticity is just doubtful, if sold the price not seldom exceed 10.000.- USD, but please handle these proof prints very carefully!


Trade Prices 2018 (USD) 
(★)
Yang Cat. No.Remarks
10 元dark grey redL11
6,00
10,00
NE24
imperf. (vertical) ☐
80,00
--.--
NE24apair
imperf. ☐
160,00
NE27pair, unissued
imperf. ☐
340,00
NE27aunissued, newsprint paper
blackimperf. ☐
600,00
NE27bunissued, proof print
30 元blackish cobaltL11
6,00
10,00
NE25
imperf. (vertical) ☐
80,00
--.--
NE25apair
imperf. ☐
240,00
NE27pair, unissued
imperf. ☐
140,00
NE27aunissued, newsprint paper
blackimperf. ☐
600,00
NE27bunissued, proof print
50 元dark greenish olivL11
6,00
10,00
NE26
imperf. (vertical) ☐
80,00
--.--
NE26apair
imperf. ☐
200,00
NE29pair, unissued
imperf. ☐
220,00
NE29aunissued, newsprint paper
blackimperf. ☐
600,00
NE29bunissued, proof print