Paul,
the 1k black yellow perf seems 14 1/4 x 14 3/4
1k black yellow looks to be from either:
- the 5th issue (1865, imperial eagle, post horns no thunderbolts and unwater marked)with 3 types of paper based on thickness, so here the CV for canceled is between 8-14 USD
- the 6th issue (1866, imperial eagle, post horns no thunderbolts and watermarked wmk#4)with 3 types of paper based on thickness, so here the CV for canceled is between 0.5-10 USD, but there are many factors that influence the value (perf, paper, wmk, inversion etc, I highlighted some spots on your stamp that might be interesting for you to find more about)
this is of course only my opinion (I could be easily wrong).
Regarding the 2k stamp, I will have a look at it later tomorrow, but it looks to be from 1875. Btw, I believe that both stamps has got vertical laid paper, otherwise you would see the 2&II and the same is with the I differently (talking about the stamp background and the numbers in the cells)
Robi
