Missouri Pacific Eagle Box Car No. 6464-150 was available in 1954 and 1955, and again in 1957. This was the first multi-colored 6464 car that Lionel produced. They used a masking system that was imperfect and to better define the separation of the colors the body mold was modified to include "grooves" in the sides. Later editions that used a silk-screen for color separation did not have these "grooves." This was one of the many color modifications that were made to this car that resulted in more variations than any other box car in this series.

The common characteristics found in all of these cars are GRAY roof and center side band with BLUE upper and lower side bands that have BLACK rubber-stamped lettering on the GRAY band and WHITE rubber-stamped lettering on the BLUE bands. There are a total of 16 variations and because of this they have been separated into five different groups that are based on their common attributes.

Group 1: Used a Type IIa body that has the stylized "Eagle" is to the right side of the door with the leading "E" 3/4" tall. GRAY painted stripe on Single-block doors with built date "3 54" to the right of these doors and no "XME" designation.

Variation A: GRAY painted roof, ends, and side bands on an unpainted BLUE body.

Variation B: Identical to Variation A except used an unpainted NAVY BLUE body.

Variation C: GRAY painted roof and side bands on ROYAL BLUE painted body.

Variation D: Identical to Variation C except with a NAVY BLUE painted body.

Variation E: Identical to Variation D except with a hi-gloss GRAY painted roof, ends and side bands.

Group 2: Used a Type IIa body that is identical to Group 1 except the "NEW 3 54" moves to the left side of the door and with an "XME" designation that is printed to the right.

Variation F: GRAY painted roof and side bands on an unpainted ROYAL BLUE body.

Variation G: Is identical to Variation F except with an unpainted NAVY BLUE body.

Variation H: Has an unpainted GRAY body with ROYAL BLUE painted side bands.

Group 3: Used a Type IIa or Type IIb body that has "grooves" cut on the sides. The stylized "Eagle" is to the right side of the door with the leading "E" 5/8" tall. Solid YELLOW painted or unpainted Single-block doors with built date "3 54" to the left of the door and with an "XME" designation that is printed to the right. The Missouri Pacific Seal is in the fourth panel except as noted below. 1955 production.

Variation I: Used an unpainted ROYAL BLUE Type IIa body that has GRAY painted roof, ends, and side bands.

Variation J: Identical to Variation I except the Missouri Pacific Seal is in the panel just to the left (5th) of the door. A rare variation.

Variation K: Identical to Variation I except with a NAVY BLUE unpainted body.

Variation L: Identical to Variation I except used a Type IIb body.

Variation M: Used an unpainted WHITE Type IIa body that is painted ROYAL BLUE and has a GRAY painted roof, ends, and side center band.

Group 4: Used a Type IIb body that does not have "grooves" cut on the sides. The stylized "Eagle" is to the left side of the door with the leading "E" 5/8" tall. Solid YELLOW Multi-block doors with built date "3 54" to the left of the door and with an "XME" designation that is printed to the right.

Variation N: ROYAL BLUE painted upper and lower side bands on an unpainted GRAY body.

Group 5: Used a Type IIb body that does not have "grooves" cut on the sides. The stylized "Eagle" is to the left side of the door with the leading "E" 1/2" tall. Solid YELLOW Multi-block doors with built date "3 54" to the left of the door and with an "XME" designation that is printed to the right. This group has variations that have a smaller Missouri Pacific Lines seal that is located in the fourth panel to the left of the door.

Variation O: ROYAL BLUE painted upper and lower side bands on an unpainted GRAY body.

Variation P: Painted ROYAL BLUE body that has a GRAY painted roof, ends, and side center band.

All of these variations do not take into account the changes that occurred in the sub-types of bar-end trucks that were used. On the later releases these trucks would have tabbed couplers.