PAIRS IMPERFORATE IN THE MIDDLE            Note: this is not a complete list - if you have additions, do notify us.
Horizontal  Pairs imperf in the middle
1876  Carol Bukarest 1 5, 10, 15
1879  Carol Bukarest 2 1 1/2, 10,15,  25, 50
1880  Carol "Pearls" 25
1885-9 Carol "Eagle" white paper 1 1/2, 3, 15
1889  Carol "Eagle" wm 3
1890  Carol "4 corners" wm 1 1/2, 3, 5, 10, 15, 25, 50
1890-91 Carol "4 corners" no wm 1 1/2, 3, 5, 10, 15,  25, 50
1894  Carol "4 corners" wm PR 25
1891  Carol "25 years" 5
Carol "Wheat" Wm II (1x) 1 1/2, 3,  5,  15, 50 2L  2L    (10b x+y)
Carol "Wheat" Wm III  3, 25b
Carol "Wheat" Wm IV (1y) 1 pic 2  1 1/2,3,  pic 2  5, 10, 15, 25
Carol "Wheat" Wm V 1b 3b, 15b red
Carol "Wheat" no wm 1, 3, 10, 15, 25
1906 Exhibition 5b
Carol 1908 "Engraved"
Carol 1908 "Typography"
1920 Ferdinand Mare 1B, 10B, 15B
1920/27 Ferdinand Mic 10b light green, 25B brown pic1, 25B brown pic 2,
60B green
1922 Coronation 50b
1930 Michael 1L
1930 Carol II 1L, 2L, 3L, 4L, 6L10L
1932 Sanatorii PTT 6+1 L
1940/45 Michael 25B, 1L, 4L5L , 20L, 100L
1940/42 Michael Air 6+1L
1945/47 Michael 0.50L, 35L brown
1887-99 Porto, green 10B
1920-26 Porto, b/w 10B 50B 2L
1947 Porto 4L
1931 Due Timbrul Aviatiei 2L

 

Vertical Pairs imperf in the middle  
1876  Carol Bukarest 1 1 1/2, 5, 10, 15
1879  Carol Bukarest 2 1 1/2, 3, 5, 10, 25
1880 Carol "Pearls" 15, 25
1885-9 Carol "Eagle" white paper 1 1/2, 3, 15
1889  Carol "Eagle" wm 5
1890  Carol "4 corners" wm 1 1/2, 3, 5, 10, 15, 25, 50
1890-91 Carol "4 corners" no wm 1 1/2, 3, 5, 10, 1525, 50
1894  Carol "4 corners" wm PR 25
Carol "Wheat" Wm II (1x) 1 1/2, 3, 5, 15 15again! and again, 25, 2L
Carol "Wheat" Wm III 1 bani
Carol "Wheat" Wm IV (1y) 1,pic 2, 1 1/2, 5, 10, 15, 25
Carol "Wheat" no wm 1, 3, 10, 15, 25
1906 Exhibition 5b
Carol 1908 "Engraved"
Carol 1908 "Typography"
1920/22 Ferdinand Mare 5b5b15b, 15b, 40b
1920/27 Ferdinand Mic 3b
1922 Coronation 5b, 25b, 1L
1930 Air 2L
1930 Recensamintul populatei 2 L
1934 Carol II 50B, 4 Lcourtesy - Dinu Matei
1935-40 Carol II 1L
1939 Carol I 100 years 7L
1945 Gazeta Matematica 2 L, 80L
1945/47 Michael 80Lorange,  80Lblue, 160L 3700L
1946 Philharmonie 160L orange
1931 Due Timbrul Aviatiei 2L

For the 1926 Ferdinand 60th Birthday issue there does exist "pairs imperforated in the middle"
which are also imperforated top & bottom - these are part of sheets perforated in only one direction.
See this issue - Essays or Special catalogue
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