 Harrison drew a design but never built such a clock himself, but in 1970 Martin Burgess, a Harrison expert and himself a clockmaker, studied the plans and endeavored to build the timepiece as drawn.He built two versions, dubbed Clock A and Clock B.Clock A became the Gurney Clock which was given to the city of Norwich in 1975, while Clock B lay unfinished in his workshop for decades until it was acquired in 2009 by Donald Saff.