Bachmann 15751 N Scale Union Pacific #12 Bobber Caboose

The Bachmann 15751 N scale Union Pacific #12 Old-Time Bobber Caboose is a short, four-wheel caboose with a raised cupola and open end platforms. Its small footprint and the #12 road marking make it a distinct choice for a compact N-scale consist. This guide identifies the exact item, summarizes the manufacturer-listed details, and explains which layout checks matter for this model.

Bachmann 15751 specifications

• Manufacturer: Bachmann
• Model number: 15751
• Store SKU: BAC15751
• UPC: 022899157511
• Scale: N, 1:160
• Railroad and number: Union Pacific #12
• Model dimensions: 2.5 in. long × 0.75 in. wide × 0.8 in. high
• Couplers: body-mounted, magnetically operated E-Z Mate Mark II
• Wheels: blackened metal with RP25 contours

Bachmann's item page identifies 15751 and UPC 022899157511, and lists the model at N scale 1:160. The manufacturer also describes an added weight for tracking, see-through sideframes, and separately applied cupola, smokestack, hand brake, and handrails. Those details distinguish it from a plain box-shaped caboose and give collectors useful points to compare against the product photos.

Why it is called a bobber caboose

Bachmann describes the old-time bobber type as a short four-wheel caboose used on mainline and short-line railroads in the late 1800s and early 1900s. That is the manufacturer's period context for the model family. It does not, by itself, prove the exact service history or configuration of a particular Union Pacific #12 prototype; use a railroad-specific reference if your layout requires that level of historical accuracy.

The model's raised cupola and compact body give it the characteristic bobber silhouette. The open end platforms and separately applied details are also easy visual checks when comparing the #12 release with another caboose from the same line.

Fit and operation on an N-scale layout

The published 2.5 × 0.75 × 0.8 inch dimensions help check visual clearance near structures, platforms, and adjacent cars. They are not a substitute for checking the clearances on your own layout. Bachmann does not list a minimum curve radius on the product information reviewed here, so test the car on your tightest curve and through your turnouts before planning a permanent consist.

The body-mounted E-Z Mate Mark II couplers are magnetically operated. Check coupler height and magnetic uncoupling performance with your own equipment. The listing's RP25-contour metal wheels and added weight are manufacturer specifications, not a guarantee of performance on every track or with every car.

Use the exact model number in a roster

Record Bachmann 15751, BAC15751, and Union Pacific #12 together. The model number prevents confusion with other Union Pacific cabooses, while the road name and number preserve the specific identity shown on the model. This is especially useful if you collect multiple color and road-name versions of Bachmann's bobber caboose.

Frequently asked questions

What scale is Bachmann 15751?

It is N scale, 1:160.

What are the model dimensions?

Bachmann lists it at 2.5 inches long, 0.75 inches wide, and 0.8 inches high.

Which couplers are fitted?

The manufacturer lists body-mounted, magnetically operated E-Z Mate Mark II couplers.

What identifies this version?

Look for the Union Pacific #12 marking, short bobber body, raised cupola, and end platforms, then confirm the 15751 model number.

See the Bachmann 15751 Union Pacific caboose product page for its current item record. Explore more N scale model trains, model railroad cabooses, and Bachmann models.