| 1 | A | B | C | D | E | F | G | H |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Sisu S-321 - Production figures of the pre-series and first serial units |  |  |  |  |  |  |  |
| 3 | Production batch | Used Volvo chassis | Used Volvo chassis | Used Volvo chassis | Produced Sisu models | Produced Sisu models | Produced Sisu models | Notes |
| 4 | Production batch | LV-66 | LV-71 | LV-72 | S-321 | S-322 | S-323 | Notes |
| 5 | pre | 7 | 1×E | 1×D | 1×E lorry | 1×D bus | 7 lorries | Production started 1931, finished 1932. |
| 6 | I | - | 3×E; 3×D | 2×E; 2×D | 5 lorries | 2 lorries, 2 buses | - | 1 chassis used for parts. Production started 22 February 1933, finished 1933. |
| 7 | II | - | 3×E; 3×D | 1×E; 3×D | 4×E; 1×D | 5×D; 1 lorry, 2 buses and 2 combination buses | - | One S-322D was afterwards converted S-321E and equipped with combination bus coach. Production started 5 April 1933, finished 1933. |
| 8 | III | - | 5×E; 1×D | 4×D | 5×E | 5×D | - | Production started and finished 1933. |
| 9 | IV | - | 2×E; 4×D | 4×D | 6 | 4 | - | Five S-321's are built on Crichton-Vulcan frame. Production started 20 June 1933, finished 1933. |
| 10 | V | - | 3×E; 3×D | 4×D | 3 | 7 | - | Three frames from Crichton-Vulcan. Production started 4 August 1933, finished 1933. |
| 11 | VI | - | 5×E | 5×D | 5×E | 1×E; 4×D | - | All frames from Crichton-Vulcan. Production started and finished 1933. |
| 12 | VII | - | 5×E | 5×D | 5×E | 5×D | - | All frames from Crichton-Vulcan. Production started 2 March 1934, finished 1934. |

Question: Which model Volvo Chassis was later converted to include a bus coach and what was the original chassis?
Answer: Sisu S-321E vehicle was S-322D with a bus coach; this was built on Volvo LV-72D chassis.