It is indeed from Bundi. Bundi used the design of the ruler protecting the Sacred Cows on its postage stamps as well:

(5 Rupee, SG 72)
And with the lettering modified for the 'Our Day' commemoration in 1917

And as Cash Coupons, to make up for the lack of small change during the Second World War:

And finally, as revenue stamps also:

(4 Anna, Setting 46)
The Sacred Cows even appeared in the Bundi Coat of Arms"

(SG O53-O55)