Model #4665 is a real classical Märklin model. An interesting version of this turning cradle truck was offered with the number #4598 by Primex. While the Märklin car is loaded with log, the Primex car is loaded with track profiles. For the different loading, the holders had been changed.
Primex #4598 - loaded with track
profiles
Märklin
#4665 - loaded with log
Side view
of the car halves.
The holders
for the loading. An extra detail of the Märklin car are the chains.
Märklin
#4665 and Primex #4598 - coupled for the photograph.