1960-2.1 perforation experiment
Forerunner experimental seals include English finish paper, tasteless gum, perforation experiments, some mini sheets and tropical dry gum; see "Perforated Christmas Seal Sheets" (in index) for full sheets of forerunners, English finish, dry gum, and mini sheets.
1955-1p1 white tasteless gum, perf.13, pair .40
1959-2.1 perforation experiment, not an error, HPIB (horizontal pair imperforate between) (PH) 1.50
1959-2.1 as above but SE .75
1960-2.1 perforation experiment, block containing two HPIB (NG 1.50) 3.00
1972-1.T1, T2, T3 Set of 3 different mini sheets 24.00
1975-4x 1975 simulated perforations over roulette 100.00
1976-5 picture sheet of 54, simulated perforations over roulette, distributed by ALA of Temple Texas 12.50
English Finish Paper- Dull uncoated paper
1954-1p2 English finish paper, block of 4 1.00
1957-2.4 English finish paper, block of 4 .40
1957-2p2 English finish, imperforate block .40
1958-2.3 English finish paper, pair .40
Dry Gum
These seals were designed to be uses in tropical climates to prevent sticking.
1963-3x3 dry gum, block of 4 1.50
1964-6.1 dry gum, block of 4 1.00
1965-5x2 dry gum, block of 4 .25
1966-5.1 dry gum, block of 8 .50
1968-3.1 dry gum, block of 8 .50
1969-2.1 dry gum, block of 4 .15
1972-2.1p1 imperf strip of 10 with dry gum 2.00
later dry gum sheets are listed with "Perforated Christmas Seal Sheets"