SOS S was originally "Standard SOS"
Model | SOS S | |||
Details |
Single deck with driver's seat within the saloon 4-cylinder petrol engine 32 seats |
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Total Number | Introduced | Notes | ||
8 | 1923 | Brush bodywork with front entrance on Tilling chassis | ||
10 | 1923 | Davidson charabanc bodywork on Tilling chassis | ||
113 | 1923 | Brush, Carlyle or Ransomes bodywork with front entrance | ||
7 | 1923 | Davidson charabanc bodywork |
SOS FS probably stood for "Forward Steering" because they were the first half cab buses although "Future Standard" also has some merit. All the subsequent models had half cabs although, after the war, the half cab was built into the main superstructure.
Model | SOS FS | |||
Details |
Single deck with half cab 4-cylinder petrol engine 34 seats |
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Total Number | Introduced | Notes | ||
2 | 1925 | Carlyle bodywork with front entrance | ||
18 | 1926 | Davidson charabanc bodywork | ||
63 | 1926 | Brush bodywork with front entrance |
SOS Q originally stood for "Queen", although two were used as demonstrators and named "Quality" and "Quantity". The SOS QL was the first Midland Red model with a low chassis. All subsequent models were built on a low chassis.
Model | SOS Q & QL | |||
Details |
Single deck with front entrance 4-cylinder petrol engine 37 seats |
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Total Number | Introduced | Notes | ||
109 | 1926 | Brush bodywork | ||
1 | 1928 | Carlyle bodywork | ||
173 | 1928 | Brush or Ransomes bodywork and low chassis (QL) |
SOS QC stood for "Queen Charabanc".
Model | SOS QC | |||
Details |
Single deck with Carlyle charabanc bodywork and high chassis 4-cylinder petrol engine 30 seats |
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Total Number | Introduced | Notes | ||
14 | 1927 |
SOS QLC was the low chassis version of the SOS QC.
Model | SOS QLC | |||
Details |
Single deck with Short Bros charabanc bodywork and low chassis 29 seats |
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Total Number | Introduced | Notes | ||
15 | 1928 | 4-cylinder petrol engine | ||
48 | 1929 | 6-cylinder petrol engine |
SOS M stood for SOS "Madam".
Model | SOS M | |||
Details |
Single deck with front entrance and Brush, Carlyle or Ransomes bodywork 34 seats |
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Total Number | Introduced | Notes | ||
49 | 1929 |
SOS XL probably stood for SOS "Excel" or "Excelsior". The class was not a success and all were converted to MM 6-cylinder buses in 1930.
Model | SOS XL | |||
Details |
Coach with Brush or Carlyle bodywork 30 seats |
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Total Number | Introduced | Notes | ||
50 | 1929 |
SOS MM probably stood for "Modified Madam", but could have also been "Modernised Madam".
Model | SOS MM | |||
Details |
Single deck with front entrance and Ramsomes bodywork 34 seats |
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Total Number | Introduced | Notes | ||
20 | 1929 | 4-cylinder petrol engine 1930: reclassified as SOS IM4 with new Short Bros bodies and revised registration numbers |
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60 | 1929 | 6-cylinder petrol engine, some with Carlyle bodywork |