Fig. 4.2: Forged Overprint
Dull red. "X" instead of star at center
Small closed "6" and period instead of dash
between "MADRID" and "MANILA".
Fig. 4.3: Forged Overprint
Bright red. Dot and blob at center.
Large "6" and dash touches "D".
Propeller blades terminate on oval frame.
Fig. 4.4: Forged Overprint
Cherry red. Dot and cross at center.
Large "2" and very short dash.
Thick characters and deformed leg on "M".
Fig. 4.5: Forged Handstamp
Deep red. Inverted "V" at center.
Large "6" and dash touches "D".
Propeller blades terminate on oval frame.
Fig. 4.6: Forged Handstamp
Dull carmine. 
Rough diamond at center. "1925" date.
Period instead of dash.
Fig. 4.7: Forged Overprint
Red. Triangle at center.
Small and slanted "1926". Notched on oval frame where omitted propeller terminate.