Bath handstamps between 1766 and 1769

The British County Catalogue [1990] does not have any handstamps between 1761 and 1772.  The next four entires have two different handstamps that appear to fit in this gap.

Firstly, from October 1766 and February 1767 is a straight-line "BATH" handstamp, 32 x 7½ mm.

 

Secondly from November 1768 and January 1769 is another straight-line handstamp, 30½ x 8 mm.

 

The difference in size between these two handstamps is apparent when one is overlaid on the other.