BM-Volvo DR 631B
The machine was called Grus-Kalle – which translated into English would be Gravel Charlie.
| DR 631B | specifications |
| Engine | BM 1113 A |
| Engine output (SAE) hp / r/min | 65 / 2 000 |
| Load t/m3 | 11 / 6,5 |
| Tires front | 18.4/15-34/14 |
| Tires rear | 16.00-24/16 SSGT |
| No. of driven wheels | 4x4 |
| Weight kg | 8 400 |
| Production year | 1967–1969 |