Figure 1
Stamps manufactured by Company A.
Figure 2
Stamps manufactured by Company B.
Figure 3
Smudged stamp impression of the Stamp 2b.
Figure 4
The size of the Stamps 1a, 1b and 1c relative to the number of stamp impressions made.
Figure 5
The size of Stamp 1c relative to the number of stamp impressions made after Stamp 1c was re-inked.
Figure 6
Stamp impressions of (a) the Stamp 1e and (b) the Stamp 2b after being exposed to daylight for about one month
Figure 7
Stamp impressions of Stamp 1a after being (a) placed in a cabinet and (b) exposed to daylight, for about seven months.
Figure 8
(a) and (b) Enlarged pictures of the Stamps 1d and 2a respectively.
Figure 9
(a) Superimposition of stamp impressions 1e and 2b. (b) Enlarged picture of the lower left corner of the superimposition. (c) Enlarged picture of the upper right corner of the superimposition.
Figure 10
Superimposition of stamp impressions 2b and 1f.