• 6994 - Schuitema - July 1956 (est)
  • 6995 - no name (blank) - July 1956 (est) - only frame measurements provided
  • 6996 - van der Tol - July 1956 (est)
  • 6997 - Rutgers - July 1956 (est)
  • 6998 - Jansen - July 1956 (est)
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