A1G 2300 Series: Mechanical Refrigerator, 50 Foot, Plug Door
This series was manufactured in Austria by Roco, and since the release of these cars as part of the A1G series there hasn't really been a lot of action on these molds. I can understand why; the molds are kind of crude and when Atlas redid plug door refrigerator cars they switched from a ribside to a rivet side body style. The paint jobs are, well, definitely not the best possible, even by late 1960's standards. The manufacturers could, and did, do better on other cars. The thick ribs and door detail may have required thicker coats of paint for coverage.
There are two variations of the 2301 Santa Fe, and the difference between them is fairly clear; the orange versus yellow is easily seen. The orange variation does not have the "MTC" device on the door but does have simulated "circle cross" insignias along the bottom of the side. These were reflective on the prototype.
There are more subtle variations of the 2302 Safeway Foods refrigerator. I believe that these have to do with the color of the underlying plastic that was painted more than with paint shades, although given how long these were produced it's quite possible that different shades of "yellow" paint were utilized. You'll also note that the dimensional data information is different on version 2302c than on the "a" or "b" versions. Also note that the black lettering sometimes looks almost dark green on some of the Safeway cars.
Barry Wingard reported number variations on the 2303 NYMX (road number 1000 or 1020), and Edward Bridges notes paint and lettering differences between the two numbers as well; see the images this page and also here for some scans Edward has thoughtfully provided for us.
Finally, Wingard also reported paint variations on the 2304 Pacific Fruit Express, see his book "The Collector's Guide to N Scale".
Key spotting features for this car are:
Note: The following information on conditions and "Approximate Value" prices are intended to be a guideline only and is presented with no warranties, express or implied. Caution: Definitions and prices can and do vary with collectors, buyers and sellers, and, of course, whether a person is buying or selling an item. That's the way a "free market" works...
A 2300 series car in "as manufactured" or "AM" condition has:
A 2300 series car in "mint in box" or "MIB," meets all "As Manufactured" criteria plus:
There are no approximate values for "runner" 2300 series cars.
AV = Approximate Value (US$ range)
AM = As Manufactured (see above)
MIB = Mint In Box (see above)
Abbreviations: Hld=Herald, R/N=Roadname, L/R=Left/Right Side of Car
*Because the relative scarcity of the 2303b NYMX 1020 has not yet been established (by me, anyway), I have not attempted to list a price range.