Medium sized Dartmouth pottery gurgle fish jugs all in green and all measuring 17.5cm high x 11cm wide x 6cm deep.
From left to right.
1) and 2) are stamped to the underside 'DARTMOUTH DEVON ENGLAND.
3) 4) AND 5) are stamped to the underside 'MADE IN ENGLAND DARTMOUTH'
This link is an interesting read