Click to expand Tap to zoom Bell Helicopter XH-12B & YH-12B 1950 Structural Repair Instructions Handbook by Bell Helicopter Sale $35.00 | / SKU 7939:R Printed - $35.00 Download - $35.00 Printed Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Helicopter Revised Apr. 1951