1911...The International Time Recording Co, the Computing Scale Co and the Tabulating Machine Co. merge to form Computing-Tabulating-Recording Co. (C-T-R).
1917...C-T-R enters Canadian market under name of International Business Machines Company Ltd. (IBM).
1919...C-T-R is introduced in Europe. Electric synchronised time clock system is introduced.
1924...C-T-R adopts name of International Business Machines Corporation.
...in the UK...
1924... IBM starts to trade alongside ITR. Mr E Stafford- Howard is managing director of both UK companies and incorporates his own Howard Brothers clock company, which already incorporated Dey Time Registers (dial recorders).
1951...It became necessary for IBM to operate in the UK as a registered company, so IBM United Kingdom Co.Ltd. was created. This new company scooped up all the existing IBM operations in the UK. and ITR became a wholly owned subsidiary trading as IBM UK Timer Systems Ltd.
In 1963, IBM United Kingdom Co.Ltd. became IBM United Kingdom Holdings Ltd. It appears that the time division reverted to the name " International Time Recorder Company Ltd.", later becoming "ITR International Time Ltd" and eventually being taken over by Blick in 1982
...in the US...
1958 IBM sells Time Division to "Simplex Time Recorder Co".
Source: IBM-UK history, Blick