Surprise SECR Maunsell D1 emerges for 'OO'

22 February 2022
A Dapol and Rails of Sheffield partnership reveals a new model for 4mm:1ft scale modellers, with delivery of models anticipated before the end of the year.

Model manufacturer Dapol, in partnership with model retailer and commissioner, Rails of Sheffield has revealed images of a surprise new model of an SECR Maunsell D1 Class 4-4-0 locomotive for OO gauge. Currently at advanced decorated sample stage and undergoing review by the Dapol team, the locomotive has never been produced RTR in the scale.

Images of the models have been shared by Rails of Sheffield, showing the attention to detail and liveries offered across the models. Fit and finish on the locomotives isn't representative of the final product, however.

D1 SECR Class locomotive Rails of Sheffield Dapol

Production is reportedly underway with a current ETA being late autumn 2022. First livery samples have been reviewed by Dapol, as illustrated. This locomotive follows the release of its popular Wainwright D Class.

D1 SECR Class locomotive Rails of Sheffield Dapol

The specification of the new models is as follows:

  • Die-cast chassis and low centre of gravity located between the driving wheels
  • NEM couplings with removable coupling pocket
  • Sprung buffers
  • R2 (438mm/17.2”) minimum radius
  • Pickup from tender and driving wheels
  • Five-pole motor located within boiler
  • Pull-out PCB for tool free DCC and speaker fitting
  • ‘Snap-fit’ conductive tender drawbar
  • Options for bass reflex speaker in tender (pre-wired)
  • Firebox glow
  • Profiled wheels
  • Detailed motion
  • Removable coal load with internal tender profiling
  • Fully detailed back-head and cab interior
  • Back by Dapol’s comprehensive warranty and service Variations (dependent on model represented)
  • Two frame variations (to include early D class conversions)
  • Two cab types
  • Two chimney types
  • Two smokebox types
  • Three dome types (with/without top feed and plated)
  • Two safety valve types (Ross-pop and Ramsbottom)
  • With and without snifter valves
  • ‘High capacity’ tenders
  • Manual and automatic lubricators
  • Additional minor detail variations

D1 SECR Class locomotive Rails of Sheffield Dapol

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The following versions are being produced:

DCC Ready:

  • (4S-028-001) SECR Grey No. 735
  • (4S-028-002) Southern green No. 1749
  • (4S-028-003) Class Southern green No. 1741 (Top Feed)
  • (4S-028-004) BR black (Early Crest) No. 31741
  • (4S-028-005) BR black (Late Crest) No. 31246
  • (4S-028-006) BR black (Sunshine Lettering) No. 31487

DCC Sound-fitted:

  • (4S-028-001S) SECR grey No. 735
  • (4S-028-002S) Southern green No. 1749
  • (4S-028-003S) Southern green No. 1741 (Top Feed)
  • (4S-028-004S) BR black (Early Crest) No. 31741
  • (4S-028-005S) BR black (Late Crest) No. 31246
  • (4S-028-006S) BR black (Sunshine) No. 31487

D1 SECR Class locomotive Rails of Sheffield Dapol

After 1901 the D class locomotive fast became the mainline locomotive of choice on the south coast. After Richard Maunsell took the reigns from Harry Wainwright in 1913, he worked on a series of new locomotives which were intended for a long service life. This involved the conversion and upgrade of 11 E class locomotives, resulting in the E1 class. This proved successful and led directly to the conversion of 21 D class into the D1 class between 1921 and 1927.

D1 SECR Class locomotive Rails of Sheffield Dapol

Though arguably not as elegant as the D class equipped with a larger boiler, a belpaire firebox and longer travel cylinders, the D1 was able to produce a considerable haulage and power increase over its predecessors. Initially allocated to Ashford shed, the class was to be found all over the south-eastern division from London to the south. Withdrawn in November 1961, no preserved examples exist.

Stay tuned for further news on these models. For current pricing and availability, visit the Rails of Sheffield website.


The font used on the tenders for 'Southern' and the associated numbers do not look correct. This was pointed out for their previous Southern offering at this stage but they ignored the comment and issued the models as shown.

Posted by Colin Styles on Wed 23 Feb 18:37:52