Guernsey Police said the theft occurred sometime in the past three weeks and want to hear if anyone has been approached to purchase the items.
It indicated that the bunker needed to be entered for the churns to be stolen.
If you have any information regarding this incident, you are asked to contact Guernsey Police on 222222 or to contact Crimestoppers anonymously on 0800 555 111 and can quote reference OC2400005408.