Panel Decorated 1x2x2 - Hollow Studs with Porthole on Light Gray Background Pattern, LEGO® Part# 4864bpx2. These are used in decent condition so they may have wear and/or scratches. 

Appeared in set# 10020-2 (Santa Fe Super Chief, Limited Edition) and set# 10020-1 (Santa Fe Super Chief). 

If you’re looking for more train parts, call our store to see what’s in stock: 470-414-2208.