- 6937 - Schroders - date unknown - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
- 6938 - Scraijen? - date unknown - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
- 6939 - Post - date unknown - Peter Post - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
- 6940 - van Halen - date unknown - no frame measurements - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
- 6961 - illegible - date unknown - baan (track), overwritten with Covens - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
- 6962 - illegible - date unknown - baan (track), overwritten with Cloosen - Our archival dating starts with frame number 6963 delivered around January 1956 (est)
