Definitive from 1889 Issue, with black overprint (18A-II-II-I) -CANCELLED G(I)-

MiNo.0018A-II-II-I-G(I) SIAM
Bpr.; Wmk.1; A = perf. 14; B = imperforate
Single Stamp, Date of issue: 1.01.1891
Picture descriptions:
e) Portrait of King Chulalongkorn
18 A II 2 Att on3 Att green / blue e (9A) "LARGE 2"
Total Quantity: 21,200 pieces
Designer: unknown
Printer: De La Rue Co., Ltd. London, England
Overprint from: The Post & Telegraph Department, Bangkok
Conservation status:
Here as a"CANCELLED G(I)"perforate singlestamp (see ORIGINAL SCAM)
Issue Notice:


Colors sensitive to water, especially MiNo. 18A. Fresh colors used pieces of MiNr. 18A are therefore quite rare and correspondingly expensive.
from MiNo. 18 there are known 2 types, which differ in the size of the "2". (Type 1 small 2, Type 2 large 2)
Specialists also distinguish the following subtypes:
Type I (small 2): The English "2" is at least 4 mm high

Sub-Type I:

Sub-Typ I: Well rounded "2" with prominent upstroke
Sub-Typ II: Right hand side of "2" flat, short food, defined upstroke
Sub-Typ III: As subtype I, but practically no upstroke
Sub-Typ IV: As subtype II, but broken at base which is rough
Sub-Type II: Concerns the "MAI PAT"; Occurs in both types I, II and III

Sub-Typ I: "MAI PAT" in a vertical position
Sub-Typ II: "MAI PAT" in a horizontal position
Type II (large 2):

Sub-Type I: Large figure "2" which has a straight foot with a slight upstroke at the end

Sub-Typ I: The Siamese numeral is half way below the base of the "aw"
Sub-Typ II: The Siamese numeral is much lower
Sub-Type II: Narrow figure "2" without upstroke to foot

Sub-Typ I: The figure "2" is below the top of the "taw"
Sub-Typ II: The figure "2" is slightly raised above the "taw"
Sub-Typ III: The figure "2" is well raised above the "taw"
Type III (small 2): The English numeral is 3,3 mm high and is of equal thickness in all parts
STAMPS UP TO APPROX. 1950:
(MH/MLH) / (*) - Mint / unused with hinges, hinge remains, incomplete gum, tropical gum etc.
(MNH) / (**) - Mint never hinged and/or without hinge remnants, complete gum as issued, possibly darkened.
CERTIFICATE / CERTIFICATION:
On request and against payment of costs (approx. 50€) we will be happy to have a certificate issued by P.A.T. Bangkok.
However, this can take up to 5 months, since the P.A.T. committee only meets every 3 months.