Request for info on Soviet 'M-61 supersonic cruise missile' please??

[Pioneer]

G'day gents

I’ve just been reading about the Soviet Myasishchev M-52 Bounder supersonic bomber project of the 1950’s.
It mentions if it had of reached operational service, it would have been equipped with two ‘M-61 supersonic cruise missile’. Can anyone tell me if this air-launched cruise missile actually entered service, and if so what is it’s actual designation (including NATO name) please.

Regards
Pioneer

 

[Stargazer]

Never serviced, probably not even built.

Here are two pictures of Myasishchev's "61" (under OKB-23).

 

[Alpino]

any dimensions to this machine?
THANKS