The dial is the first thing you see on a pocket watch and often the first thing that's been changed. A century of drops, overtightened screws and well-meant repairs means many American railroad watches now wear a dial they didn't leave the factory with. Some of those dials are period originals from the same maker, some are later replacements, and some are paint or printing over something else. You can sort most of them from listing photos once you know what to look at.
Know the three materials
Fired enamel. Most dials on these watches are enamel, a glassy coating fused onto a thin copper base in a furnace and then fired again after the numerals were added. Collectors often call them porcelain, though there's no porcelain involved. Enamel was usually applied to the back as well as the front to stiffen the dial. Glossy glass enamel throws back clear, mirror-like reflections, while hard enamel has a softer satin look.
Metal. Metal dials are painted, silvered or plated, and a painted metal dial can be white too, so color alone doesn't tell you. Sunk-looking metal dials were often just stamped with indentations to imitate a sunk enamel dial.
Melamine. Hamilton developed melamine plastic dials in the 1940s and called the material Enameline. It turns up on many 992B Railway Specials.
Single sunk, double sunk and pressed
On an enamel dial, "sunk" means a separate piece was fitted below the main surface. A single-sunk dial has only the seconds bit recessed. A double-sunk dial has a recessed center and a seconds bit set deeper still, made from separate pieces soldered together. That extra work is why double-sunk dials went on better movements. Mid-grade dials imitated the look by pressing the recesses into one piece of metal before enameling. On a true sunk dial you can see a sharp fitted edge around each recess. A pressed dial slopes smoothly into it. The Pocket Watch Database's dial guide adds that a dial alone can't prove a movement's grade, so read the dial and the movement together.
Damage that's normal
Hairline cracks and small chips are the characteristic damage on enamel, and most collectors accept a few light hairlines on a hundred-year-old dial. They often look worse than they are because dirt collects in them, and a careful cleaning can make them much less visible. Big chips that show the reddish copper underneath hurt both the looks and the value, and overtightened dial-foot screws are a common cause of cracks. Cracks in enamel can be filled or patched, but nothing makes them disappear.
Enameline dials age differently. The top layer tends to develop a spider web of cracks that starts in the center and keeps spreading, and in bad cases the cracks can catch the hands. Original replacements have largely run out, so a crazed 992B dial is usually something you live with.
Signs of a repainted dial
Metal dials are easy to strip and repaint, and a repaint can look nearly new while costing the watch its originality. Enamel is much harder to repair, so on enamel watches the usual problems are replacement dials and patched damage. On a 992B the giveaway is simpler still. Hamilton never made a paint-on-brass dial for the 992B, so a crisp, crack-free painted dial on one has been redone. A few 992Bs did leave the factory with fired enamel dials, and those look glassy rather than painted. These are the things to look for in photos:
- Printing quality. American factories moved from hand painting to transfer printing from the 1880s, which gives even opacity across thick and thin strokes. On a railroad-era watch, lettering that wobbles or thickens at the stroke ends, or a signature that looks a little off next to known examples, points to later work.
- Surface. A flat, even sheen with no depth often means paint. Fired enamel looks glassy in angled light.
- Too perfect. A spotless dial on a worn case and a tired movement deserves a question.
- Stickers. Some replacement dials sold online for 992Bs are inkjet-printed sheets stuck over another dial or a metal disc.
Signs of a replacement dial
Replacement dials were made for decades to keep watches running. A few tells come up again and again:
- A metal back. Later replacements from suppliers such as S. LaRose have a metal base instead of enamel, often stamped "Swiss" on the back. They're also often slightly off-white, with a softer bevel around the sunk areas, and thicker than an original. That extra thickness can make the setting lever hard to catch with a fingernail.
- No sunk seconds. Many reproductions are a flat metal disc printed to look like the original, with no recess at all.
- The wrong number of feet. American dials were held on by three dial feet. Swiss-made imitation watches of the period typically used two.
- Collector dials. Sought-after patterns attract copies. 1980s replica Ferguson dials carry a blue mark at the 45-minute position so they can't pass as originals.
A replacement isn't automatically bad. A period dial from the same maker in good condition makes a perfectly good watch to carry. It should just be described as a replacement, and the price should reflect it.
The Montgomery dial
Some of the most wanted railroad dials number every minute from 1 to 60 around the edge. Henry S. Montgomery, the Santa Fe's general watch inspector, designed the layout with his son around 1899 to stop misread minutes, and it spread to railroad watches across the country after about 1910. Many collectors save the name "true Montgomery" for dials with the 6 printed inside the seconds bit, though Montgomery himself treated the numbered minutes as the defining feature. Since these dials carry a premium, look hard at the printing on any Montgomery listing.
What to ask the seller
- Ask for a photo of the dial in angled light so you can see the surface and any hairlines.
- Ask whether the dial has been off the watch, and whether it's been repainted, repaired or replaced.
- Ask for a photo of the back of the dial if it's out for service. You're looking for enamel, not bare metal.
- Compare the signature and numerals with a known original of the same grade.
Once the dial checks out, move on to the movement. Our guide to dating a Hamilton serial number covers that, the eBay red flags guide covers mismatched parts, and the 992 family guide shows which dials went with which 992s.
