Crown Model Company made a series of models back in the 60's and 70's that closely resemble some of the early Roco models. They were imported to the USA by AHM.The models carry no country of origin markings on them. They come in a variety of colors including white, yellow, lt. grey and brown. The tracked vehicles have silver-colored soft-plastic tracks.
Box info states that these are made in Japan

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Ho AFV Series

#1 K-505 Panther A and a US 37mm AT gun
#2
#3 (Sherman & US jeep)
#4 K-506 Panzer VI Tiger II B (Porche turret)
#5
#6 K-502 Panzer Mk-IV F2 and a Kubelwagen
#7 K-507 T34-85
#8
#9 K-503 Jagdpanzer III and barricade
#10 K-508 155mm howitzer & WC52 Dodge 3/4 ton command car (top down version only)
#11
#12 (US SP 155)
#13 (German infantry)
#14
#15 (Africa Corps Infantry)

I'm still doing research on the missing info...