Formula cards of Travancore

Formula cards are those cards which are devoid of price and not sold over the counter.
Mainly used by government institutions.

The 1902 Service blue card is catalogue by Peter Wells (S-1) & Edward Deschl (OC-2) inadvertently as a postal stationary, under the  Official Postal Cards.

Blue tinted.. 1902 Service formula card (with no denomination / value.....inter departmental usage).

1906 Paravur to Ettumannor.

(The above card is from the collection of Dr Mohan, Trichur).

Travancore 1932 Service (Formula) card, primarily used by the Savings Bank of Anchal department, Travancore.....Udayamperoor to Udayamperoor.

The 1902 blue formula card was later reissued (1922) with '5 C' surcharged in red, and sold over the counter. But less than 5 are know to exist.

Travancore 1921 official card.....actually 1902 formula card (with no denomination / value.....inter departmental usage) surcharged (reddish violet / red) with 5 C ( 5 Cash). Card...bluish tint in colour. Very Scarce.

A used copy of this stationary card is yet to be seen.