R3640 PO Willans and Robinson Peckett W4 Class 0-4-0ST 882 Niclausse - Era 2Prototype Eras Era 2 (1875 to 1922) Pre grouping Era 3 (1923 to 1947) The Big Four (LNER, LMS, GWR and SR) Manufacturer description The Peckett W Class was a classic, late Victorian, four coupled, medium range, industrial saddletank that comprised six separate variations, from the W2 of 1884 to the W7 of 1938. Locomotives were built at the Atlas Engine Works in St. George, Bristol, Peckett & Sons Ltd having taken over the business established there by