+ Issue Date     : 03/1983
+ Classification : Postage Stamp
+ Emission       : Definitive / General Issue
+ Designer       : Mohd Yusof / Artworks: Malaysian Advertising Services
+ Printer        : Asher Security Printers Singapore Pte. Limited
+ Printing       : Lithography
+ Watermark      : Unwatermarked
+ Perforations   : 14½
+ Separations    : Normal Perforations
+ Gum Type       : Gum
+ Shape          : Rectangular
+ Orientation    : Horizontal

The difference between the reprint of the watermarked and unwatermarked printings are:

3a - Dull in colour and the two thin branches on the left are red.
8 - Brighter and sharper in colour shades and the two thin brancges on the left are white.

6b - Blackish brown background.
11 - Bronze-green background and sharper design.

9, 10, 12 - The design are much sharper and bright in colour shades.