The Wrenn W2207 R1 0-6-0 Southern Region Tank Locomotive was one of the largest and most popular production tanks that Wrenn, Basildon produced. A few examples have been seen in Period 1 (!966 - 1969), none produced in Period 2 (Triang/Wrenn 1970 - 1971), the majority being issued in Period 3 (1972 - 1980). Production records indicate that only 315 were produced in Period 4, up to 1990 when Wrenn, Basildon decided they had satisfied the market requirements.These P4 locomotives today are much sought after by collectors.

All pre Period 4 tanks were in SR Green and tended to have the matt finish typical of the earlier production of Wrenn Locomotives. The Period 4 examples seem to differ in three main aspects;

1. The main paint colour is dark olive as opposed to the earlier SR Green.

2. The paint finish has a brighter "sheen"typical of the later Period 4 Locomotives

3. The "1127 SOUTHERN"identity was in a more pronounced and deeper yellow signage. 

The metal chassis, pick up, wheels, valve gear, couplings and R1 motor had no signifigant changes through the years as far as I can detect.

THE EXAMPLE SHOWN IN THE PICTURES IS THE LATER PERIOD 4 ISSUE FROM THE BASILDON FACTORY, CIRCA 1982