Type 2 B-overprint
five new stamps have been listed by Gibbons with the type 2
overprints. These are 6c lilac, 12c blue and 24c green with Crown
CC watermark, and the 2c brown and 4c rose with Crown CA
watermark. We have since found the 8c yellow Crown CA with the
type 2 overprint and other values may exist.
Overall, the two types of B are almost exactly the same height and the type 2 is very slightly wider than type 1.
B of the type 2 overprints appears slightly more symmetrical than the
type 1, with the top and bottom balloons of the B almost equal in size
when measured vertically. The two balloons of the type 2 B are
almost exactly the same width when measured horizontally, whereas in
the type 1 B, the top balloon is clearly smaller than the bottom
balloon, both horizontally and vertically. The bottom balloon of
the type 2 on some stamps appears to dip below the level of the bottom
of the strong vertical bar; this is thought to have been caused by
damage to at least one of the Bs.
See: Norris, Andrew, Bangkok, the British Post Office in 1882, published in Gibbons Stamp Monthly, February 2008.
Measurements rounded to the nearest 10th of a mm.