Following the success of the
Collier and Beale built trial-production sets the production of 1000
sets was authorised. However, considerable difficulty was experienced in obtaining certain components, especially meters
and by April 1942 only sufficient material for the manufacture of
750 sets of the 1000 sets authorised was available.
The ongoing lack of meters forced
a minor redesign during the first production run so that only one
meter was required. The redundant meter hole left in the
remaining stock of already manufactured front panels was covered
with a metal plate fitted with a watch holder. Sets
manufactured with this modification became known as the Mk-1 type 2.
Less than 1000 of this type were made.
The set shown above is located in
France and owned by collector Andre-Yves Couchouron, F1JHW.
The set is in particularly good, almost as new, unmodified
condition. The history of the set is unknown but it most
likely formed part of one of the large shipments of ZC1's sent to
Europe in the last months of the war. The sets arrived too
late to see wartime service and although many were disposed of
as war surplus material, significant numbers were also issued to the
rebuilding post war military services of a number of countries.
From the condition of this set it has clearly been in good storage
for many years, possibly hidden amongst reserve stocks in the back
of a Government warehouse somewhere.