Taunton Penny Post - boxed "No.11" and unboxed "No.11" ?

A Receiving House at Creech St Michael was approved after a complaint about the postal service by the Rev. Henry Creswell in March 1830.  It was allocated a boxed "No.11" handstamp.

I've also got a letter with an unboxed "No.11" handstamp from 1844 - this may or may not be from Creech St. Michael, unfortunately it is only a wrapper with minimal contents and it has not proved possible to tie this down definitively to Creech St. Michael.