Is there an actual title to individual pieces in this range ...?
And the official title (from the sales brochure) is ... Lobster (design code CT439 - where CT is not related to Colin Terris, I believe).
Engravers' initials on Sea Shanties are notoriously difficult to decipher (tiny), and there were more engravers working at Caithness than listed in Mark Hill's book. My Lobster is signed MN (my interpretation), my Dolphins LM (again my interpretation), ... neither fits any name in Hill's book.