First launched in 1943. (ca. 1943-48)
40s Lastbil Type 1
1. Nr. 405 Lastbil (red)
2-3. Nr 405/1 Kranbil (red)
4. Nr. 405/2 Brandbil (red)
5. Nr. 405/3 Benzinbil, 4Hj (red)
6. Nr. 405/4 Benzinbil, 6Hj (blue)
7. Bottom stamp logo of 405/4
8. Nr. 405/5 Ambulance (blue -cr. Olaf)
9. Early design of 405 series with biconcave wheels
10-11. Different design on 405 series: spare tire, the shapes and colors of oil tank.
There also exist white and green ones.
Compare with Type 2:
[Original post and comments on Flickr.]