Definitive from the 1889 Issue, with black overprint (16)

Description

MiNo. 0016A-I MNH SIAM
Bpr.; Wmk.1; A = perf. 14; B = imperforate
Single Stamp, Date of issue: 1.4.1889
Picture descriptions:
e) Portrait of King Chulalongkorn
16 A I 1 Att on 2 Att green / carmine e (8A) TYPE 1
Total Quantity: 122,000 pieces
Overprint from: The Post & Telegraph Department, Bangkok (PRINTER A)
Quantity: 120,800 pieces
Overprint from: Akson Printing Press, Bangkok (PRINTER B)
Quantity: 1,200 pieces
Designer: unknown
Printer: De La Rue Co., Ltd. London, England
Conservation status:
Here as a "MINT NEVER HINGED (MNH)" perforate single stamp without hinge and / or hinge rests, darkened gum (Tropical Gum), gum as issued
Issue Notice:

MiNo. 16 was overprinted by 2 printers:
- Printer A = The Post & Telegraph Department, Bangkok
- Printer B = Akson Printing Press, Bangkok
The two printers share the overprints as follows:
- 16 A I (TYPE 1) = Printer A and B
- 16 A II (Type 2) = only printer B
- 16 A III (Type 3) = only printer B
- 16 A IV (Type 4) = only printer A
Colors sensitive to water, especially MiNr. 16A. Color fresh used pieces of MiNr. 16A are therefore rare and correspondingly expensive.
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.