4th Surcharges Overprinted with “Changed to” (第四次東北加蓋“改作”)

Yang NE125-127, J.DB-59

500 元 / 50 元 ⦿
[Yang NE125]

1500 元 / 150 元 ⦿
[Yang NE126]

1500 元 / 150 元 ⦿
[Yang NE126N]

2500 元 / 300 元 ⦿
[Yang NE127]

Overprint varieties (character arrangements, inverted):

1500 元 / 150 元
["佰伍圓" for "伍佰圓",
Yang NE126f]

1500 元 / 150 元 ["作改" for "改作" (left),
Yang NE126Na]

1500 元 / 150 元
[inverted
Yang NE126N --]

2500 元 / 300 元
["佰伍圓" for "伍佰圓",
Yang NE127c]

2500 元 / 300 元 ["作改" for "改作" (left),
Yang NE127b]

2500 元 / 300 元 [inverted, Yang NE127a]

Printed on both sides:

500 元 / 50 元
[front side,
Yang NE125a]

500 元 / 50 元
[rear side, inverted,
Yang NE125a]

Small numerals varieties (just some examples, more can be found):

500 元 / 50 元
[second "0" small ]

1500 元 / 150 元
[second "0" small]

1500 元 / 150 元
["5", second "0" small]

2500 元 / 300 元
[small "2"]

2500 元 / 300 元
[second "0" small (left)]

2500 元 / 300 元
[small "5" (left)]

Remarks (in general / for this issue):
– All surcharged 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.
– The “dark bluish green” and “blackish green” overprint for the 1500 元 / 150 元 denomination is visibly very close so I made the decision to combine both into one overprint type with a dark bluish / blackish green color shading.
– Many stamps can be found with small numbers, I don’t list them separately in the price list. I have the theory that the small numbers are replacements for the origin numbers because the 5th Surcharges Overprinted with “Change to” issue was later overprinted with same types and here we can be found many more small numerals. Seems more and more they got lost / broken during the continued overprinting process.