Hi: There is a website for the National Trust carriage museum at Arlington Court that has some good pictures and information on different carriage types and no doubt there are other similar sites that should answer your question.
Im doing some reasearch on Rock & Sons after they arrived in Tunbridge Wells in 1892 and became Rock,Hawkins & Thorpe although still given by that name in the directories at White Rock,Hastings ; Grosvenor Rd Tunbridge Wells and 24 Baker St. London W. .Still operated by that name in 1903 but in the 1913 directory are Rock,Thorpe,Chatfield on Grosvenor Rd.In the 1922 directory the name is changed to Rock,Thorpe & Co. and later still Rock,Thorpe,Watson.
Does anyone have any information about the partners Chatfield and Watson and any photos they can share with me of the companies buiildings in Tunbridge Wells?