Automatic K-416
1960 · 10k Yellow Gold Filled · Automatic
About the Automatic K-416
Made only in 1960, the Automatic K-416 is a clean, round-cased automatic from Hamilton's broader Automatic family, powered by the caliber 661. The case is 10K yellow Gold Filled, and the white dial carries embossed gold numerals and markers at the 3, 6, 9, and 12 positions with a sweep seconds hand. Hamilton listed it as Weatherproof, which was standard language for the era and worth keeping in context today. It was offered on either a bracelet or strap depending on buyer preference.
Embossed gold numerals and markers hold up better than painted dials over time, but they can still show wear at the high points if the dial has been mishandled or improperly stored. The white dial background is worth scrutinizing closely since any moisture intrusion tends to show up as staining or discoloration near the edges first. Finding one with the dial intact and the gold-fill case in honest, unworn condition is a satisfying combination.
From the Catalog
Hamilton described the K-416 simply as a 10K yellow gold-filled case with yellow embossed markers and Weatherproof construction. It retailed for $100.00 on bracelet in 1960, or $89.50 on a strap, which put it squarely in Hamilton's mid-tier automatic range for that year.
Hamilton Catalog Images
1960
What to Look For
| Dial | Look closely at the embossed gold numerals and markers under good light. The raised surfaces can show wear or flattening if the dial was ever touched or wiped down. Check the white background for spotting, staining, or discoloration near the edges, which often indicates past moisture intrusion. |
| Crystal | The K-416 opens through the crystal rather than the case back, so look carefully at the crystal edge and the bezel for scratches or tool marks. Pry attempts on the case back are common on watches like this, and the crystal seal can be compromised in the process. |
| Movement | The caliber 661 is an automatic and should wind from normal wrist motion. Lubricants dry out on movements this age, and dried oil generates enough friction to stop or severely slow the watch even if it appears to run. A service is the right starting point on any unserviced example. |
| Case | The 10K yellow gold-fill wears from the high points over time, typically the lugs and caseback edges. Check those areas closely. Also inspect the case back for scratches or dings from pry attempts, since the back-opening design often confuses people unfamiliar with this type. |
| Crown | The crown should pull out smoothly and set the hands without slipping. A worn crown or damaged crown tube is a common find on watches this age and worth factoring in, since replacement parts require sourcing from vintage supply. |
The Movement
The caliber 661 is a 17-jewel automatic movement made by Hamilton in the United States. It winds via an oscillating weight as the watch is worn, meaning no manual winding is needed under normal use. It is a reliable workhorse of Hamilton's American automatic era, though like all movements of this age it benefits from fresh lubricants and a proper service to perform as intended.