Union Pacific 3900 Series 4-6-6-4 Challenger drawings, engine only- Smoke Box – Smoke Box Arrangement (3,4)
		SKU/Drawing Number: 744-CA-29712
			| Scale to 1 ft.: | 1 1/2” | 
| Wheel Arrangement: | 4-6-6-4 | 
| DWG. Size (in): | 30x58 | 
| Drawing Title: | Smoke Box – Smoke Box Arrangement (3,4) |