Quote:
Can you expand please?
Are you able to supply Scott numbers?
What is / where is the secret mark?
Sorry Rod, I went to sleep soon after posting that.
In the Scott catalog, see the header information above Republic of China #381. Yes, you are correct, the secret mark is in the Chinese character at top right corner.
Not sure which year Scott you have, but they did correct a confusing header arrangement a few years ago. The entire section from #381-401 is for Type III with secret mark (they have now added that immediately in front of #381). The only difference between the 2 subsets #381-391 and #392-#401 is the watermark.
You mentioned Northeast China #9 (left stamp) and #10 (right stamp). The original non-overprinted stamps are Republic of China #354 and #384, respectively. Both are Type III (I believe this denomination only exists as Type III). The latter has the secret mark.
Good thing you asked. I now realize that in the newer edition Scott, they illustrate the 3 types above the header for #344. Wish they had done that decades earlier! The phrase "partially shaded" is not as clear as it sounds -- you don't fully understand what constitutes "partially shaded" until you see the stamp.