D31P-20 S/N 45001-UP (Straight Tilt Dozer)
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D31P-20A S/N 45001-UP (Power Angle Tilt Dozer)
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D31PX-21A S/N 50501-UP (Overseas Version)
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D31PX-21 S/N 50001-50499 (For North America)
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D37P-5A S/N 1549-3000 & A1649-UP
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D37PX-21 S/N 5001-5499 (Overseas Version)
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D37PX-21A S/N 5501-UP (Overseas Version)
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D37PX-21 S/N 5001-5499 (For North America)
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