1961 Cent Doubled Die Or Machine Doubling?

This looks like MD to me..

Note on the date, the left side of the devices are affected, by having the contour of the devices removed and leaving a 90 Degree angle on that side of the devices. Not the right side of the devices show the contour. So it is not hub doubling. Hub doubling enlarges/sometimes distorts the devices on a doubled die. Look at the centers of the devices to see if they are wider than normal. On your coin the are smaller than normal. So the MD and a polished die was why you coin was affected. Not a doubled die though, no die doubling is present, just reduction of the devices. Variety Vista doesn't list a DDO on either of the mints that year.
Wexler shows there are three different doubled hubs that year:
http://doubleddie.com/627734.html
Just a few DDO's, but there are minor on most of them.
1961 1¢ Pr WDDO-005
Is the nicest one. It is a proof coin. But take a look to see what to look for on this year. That is the map to take you to your destination.

Aye, Machine Doubling.