Mil. Sta. No. 1, Philippine Isls, / REGISTERED Postmark
Period of Use: July 1, 1899 to November 23, 1901

ENCIRCLED "M" KILLERS ON 3-COlOR FRANKING

1901 APRIL 3: MANILA to LONDON

Ref: Goodale Rg-5a and Baker DR-1a
Double Circle Registry Postmark in Purple, Violet or Black 
Diameter: About  32.0 mm
Exist with inverted date on DEC 30 1900

3c, 5c and 10c Overprint issues (215-217) for proper 18c double outbound registered rate (10c + 8c) tied with black encircled "M" killers to denote MANILA purple Mil. Sta. No. 1, Philippine Isls, / REGISTERED dispatch. Received LONDON, May 5.