Accumatic A-575 Calendar
1961 · Stainless · Automatic
About the Accumatic A-575 Calendar
Made only in 1961, the Accumatic A-575 Calendar is a stainless steel automatic with a date window, running on Hamilton's caliber 692 with 22 jewels and a sweep seconds hand. The A-575 sits within the Accumatic family, Hamilton's line of automatic wristwatches developed through the late 1950s and into the 1960s, and it shares its calendar complication with the broader Dateline and Sea Scout relatives. The embossed white numerals and markers with luminous dots give the dial a bit of dimension and legibility that distinguishes it from the plainer Accumatic options of the same period. At $69.50 with a bracelet included, it offered real functionality at a competitive price point.
Surviving examples tend to show their age around the date window, where moisture and dust have a habit of collecting over the decades. The embossed numerals are more durable than printed ones but still worth examining closely under good light for chips or separation at the edges. Finding one in honest, unpolished condition with the original bracelet intact would be a genuinely good score.
From the Catalog
Hamilton listed the A-575 Calendar in 1961 as a stainless steel automatic with embossed numerals, luminous markers, a date window, and a bracelet, priced at $69.50, making it one of the more feature-rich options in the Accumatic lineup at that price.
Hamilton Catalog Images
1961
What to Look For
| Dial | Look closely at the embossed numerals and markers. They should have clean edges with no chips or separation from the dial surface. Check around the date window for discoloration or moisture damage, which is common on calendar dials that have seen any humidity over 60-plus years. Luminous dots can darken or shrink with age, which is normal, but missing dots are worth noting. |
| Crystal | The crystal should be clear with no deep scratches that distort the dial view. Minor surface scratches are expected on a watch this old, but cracks or chips near the date window are a concern since replacement crystals with the correct aperture cutout are not always easy to source. |
| Movement | The caliber 692 is an automatic, so the watch should wind from wrist motion and run continuously without any manual prompting. Dried lubricants are a real concern after more than 60 years. If the watch stops when set down or runs erratically, a service is overdue. The date mechanism on this caliber involves a spring-loaded index lever that can be finicky, so a watchmaker familiar with Hamilton automatics is the right call. |
| Case | Stainless steel holds up well, but check the case band for deep dings or signs of over-polishing that would soften the original lines. The case back can be difficult to open on these models, so look for evidence of prying attempts around the lip, which can leave marks or damage the gasket seat. |
| Crown | The crown should thread or snap in smoothly and set the time and date without slipping. A worn crown that does not engage the date-setting position cleanly is a common issue and worth factoring into any purchase. This watch is not suitable for water exposure despite its original weatherproof rating, so treat it accordingly. |
The Movement
The caliber 692 is a 22-jewel automatic movement, winding from the motion of the wrist through a rotor system rather than requiring manual winding. It runs a sweep seconds hand and drives the date complication, with the calendar mechanism adding some mechanical complexity that makes servicing a bit more involved than a time-only automatic. The 692 has a fixed hairspring stud, which limits how easily beat error can be corrected, so getting one properly regulated takes a patient hand.