Beaminster was in both the Crewkerne and Bridport Penny Posts. It had both the boxed "No.1" and "No.2" Receiving House handstamps in the Crewkerne Penny Post and also the boxed "No.1" in the Bridport Penny Post (I don't know whether it used a "No.2" handstamp in the Bridport PP as well).
I have three examples of the "No.2" handstamp in the Crewkerne Penny Post. One has a manuscript date of the 1st September 1826 while the others only have later annotated dates, one in pencil of 10th August 1825, the other in ink of 30th September 1835. This last one is very suspicious as the straight line "BEAMINSTER" handstamp is only known in use until 1834.
Did Beaminster use both the "No.1" and "No.2" handstamps at the same time, or was the "No.2" handstamp replaced by the "No.1" ?
I also have an example of Beaminster using the "No.1" handstamp in the Bridport Penny Post, in 1838.