Rod222 has shown the cover of the catalogue of the Bundi
Sacred Cows stamps, so here are a few of the actual stamps:

The first of the series: the 1914 ½ Anna, SG 18
The high values came with a decorative border:

The 4 Rupee of 1917, SG 48
The design was also overprinted for use as Cash Coupons, a substitute for low denomination coinage which was in short supply, during WWII

3 Pies and 1 Anna types (1 Anna was worth a bit more than 1 US cent at the time)
And a cinderella from WWI:

The 'Our Day' fund-raising stamp, with the name in the top tablet replaced with 'Our Day', the bottom value tablet replaced with the name of the State, Bundi, and 'One Anna' in the bottom margin. Gibbons describes these stamps in a footnote, and says that there is no evidence they were used for postage. This one, though,
does appear to be postmarked.
Finally, the Bundi coat of arms, with cow supporters:

The 6 Pies (= ½ Anna) of 1941, SG 80