"a square old-fashioned daimler"
!925 Daimler
Public Domain!925 Daimler - Credit: AlfvanBeem

 The Daimler Motor Company was founded in London in 1896, with its manufacturing base in Coventry. Over the decades, the company went through various changes which culminated in its acquisition in 1960 by Jaguar, which is now under Indian ownership.

Assuming Rebecca is set in the late 1920s or early 1930s (see bookmark p.321), an 'old-fashioned daimler' would presumably belong to the early or mid-1920s

Click here to see a 1922/1923 Daimler

Click here to see a mid 1920s  Daimler

Click here to see a Daimler 'Double-Six' (launched 1926)

Click here to see a 1933 Daimler

Click here to see a 1934 Daimler

Click here to see a 1935 Daimler

Click here to see a 1938 Daimler