Here is a Lionel 6-27409 Atchison Topeka & Santa Fe 8000 Gallon Water Tank Car #100844.
On many railroads, tank cars were converted to work duty to haul water, fuel, and other liquid supplies. The majority of Santa Fe work tank cars were used for storing and hauling water, an essential supply for thirsty workmen and for operation of steam power equipment.
Features Include:
Die-cast metal sprung trucks and operating couplers
Hidden uncoupling tabs
Separately applied metal details
PRODUCT SPECIFICATIONS
Rail Line: Santa Fe
Gauge: Standard O Scale
Brand: Lionel
Min Curve: O-31
Dimensions: Length: 9″
Most Recent Catalog: Lionel 2009 Volume II

This item has been graded per TCA standards C-7: Excellent based on visual appearance. The overall appearance of this item may be improved with a gentle and thorough cleaning. There are light nicks and scratches on the surface of this item. The wheels show average run-time. Some minor trim elements are misaligned, bent, damaged or missing. The instruction manual is not included. The original box is included. Please check the photos for a detailed look at this item. Overall condition is Excellent.

Condition: Excellent (C-7)
Operational Status: Not Applicable
Original Box: Yes (P-6)

Manufacturer: Lionel
Model Number: 6-27409
Road Name: Atchison Topeka Santa Fe (ATSF)

Scale/Era: O Modern
Model Type: Freight Cars

The SKU for this item is 5977664.

Product Id: 11449219