Quick Take
Picking a diecast dozer, crawler, or motor grader usually comes down to two things: scale and what you want to do with it. Do you want a smaller model that fits on a desktop shelf, or a large display piece that dominates a case? Do you want working tracks and an adjustable blade, or a sealed box that stays factory-fresh? This roundup compares four very different models: a vintage Komatsu D475A dozer, a Komatsu GD655-6 motor grader, an International Harvester 175 crawler/dozer, and an Allis Chalmers HD-21 crawler. The listed prices span from $39.99 to $325.00, so the price spread is wide even before you decide on a scale.
Price Comparison
| Model | Listed Price | Price Bar |
|---|---|---|
| Shinsei Komatsu D475A Diecast Dozer (1:50) | $39.99 | |
| Komatsu GD655-6 Motor Grader (1:50) | $56.39 | |
| Allis Chalmers HD-21 Crawler (1:50) | $115.00 | |
| First Gear 40-0127 International Harvester 175 Crawler/Dozer (1:25) | $325.00 |
Decision Matrix
- Pick the Shinsei Komatsu D475A if the lowest listed price and a compact dozer with moving parts are your priorities.
- Pick the Komatsu GD655-6 Motor Grader if a grader belongs in the collection.
- Pick the Allis Chalmers HD-21 Crawler if a mid-priced First Gear crawler with blade and drawbar is the target.
- Pick the First Gear International Harvester 175 if the largest scale in this group matters most.
Product Notes
#### Shinsei Komatsu D475A Diecast Dozer
The Shinsei Komatsu D475A is the lowest-priced model in this roundup. It is a vintage diecast dozer with functional segmented metal tracks that roll, an adjustable front blade, and a rear ripper with cylinders that hold position. That combination gives you working parts at a compact size. The title's "Read Description" warning is the main thing to keep in mind: this is a loose model with minor shelf wear and no original box. If you care more about track movement and a smaller footprint than pristine packaging, this is a strong entry point.
#### Komatsu GD655-6 Motor Grader
The Komatsu GD655-6 is the only motor grader in the group. The diecast model comes with its original box and is graded C-9 Factory New based on visual appearance, so the presentation is clean. It also fills a different niche: a grader instead of a dozer, which gives a shelf or display case a new silhouette. The limitations are the missing instruction manual and the 17-years-and-up age level. At this price point, it is the grader to consider when you want the packaging included.
#### First Gear International Harvester 175 Crawler/Dozer
At the top of the price range, the First Gear International Harvester 175 has a larger diecast body. The vibrant yellow paint gives it a strong display presence, and the model has never been removed from its box, so the presentation remains intact. The mild corner wear on the near-mint box and the 17-years-and-up age level are the trade-offs. The 14+ recommended range also points to adult collectors. If your shelf can handle the bigger scale and you want a crawler/dozer that anchors the collection, this is the one.
#### Allis Chalmers HD-21 Crawler
This First Gear crawler comes with a straight blade and drawbar. The unopened box and orange paint make it a straightforward choice for a sealed-box collectible at a mid-level price. The age recommendation is 15 and up, so it is not framed as a child's toy. What you get is a compact crawler that keeps the box intact, plus the blade and drawbar for extra detail.
Final Recommendation by Use Case
- Compact dozer option: Shinsei Komatsu D475A Diecast Dozer.
- Motor grader option: Komatsu GD655-6 Motor Grader.
- First Gear crawler option: Allis Chalmers HD-21 Crawler.
- Large-scale display piece: First Gear International Harvester 175 Crawler/Dozer.
Start with the Shinsei D475A if the lowest listed price is the priority. If a grader belongs in the collection, the Komatsu GD655-6 is the one to choose. For a First Gear crawler without moving up to 1:25, pick the Allis Chalmers HD-21. And if a centerpiece scale matters most, save room for the International Harvester 175.
