Rolex Oyster Perpetual Tru Beat Ref. 6556

To our knowledge and based on discussions with collectors and specialists, fewer than 2 examples may exist with this exact configuration.

Historical Background

During the 1950s Rolex introduced the Tru Beat complication specifically for professionals who required precise second counting, especially doctors and medical researchers.

Unlike most mechanical watches where the seconds hand sweeps continuously, the Tru Beat mechanism was designed to jump once per second, allowing users to easily count pulse rates.

Key characteristics of the Tru Beat model include:

• Production lasted only about 5 years
• Powered by the rare Rolex caliber 1040
• Mechanically derived from the caliber 1030 but significantly more complex
• Produced in very small numbers due to limited demand
• Many examples were later converted to caliber 1030 because spare parts for the Tru Beat mechanism became difficult to obtain

As a result, finding an original example with the correct caliber 1040 movement today is extremely difficult.

The Extremely Rare Dial Configuration

The most fascinating aspect of this watch is the dial configuration.

Unlike standard examples of the reference 6556, this watch has:

• The correct Tru Beat reference case
• The correct caliber 1040 movement
• The correct crosshair dial layout

However, the dial does not include the words “Tru Beat.”

Additionally:

• The seconds hand sweeps smoothly rather than jumping
• The dial is completely original and untouched
• The configuration appears to be factory original

This suggests a very late production piece or a special configuration produced during the final years before Rolex discontinued the model.

Examples like this are almost never seen and are believed to exist in extremely small numbers.

Dial, Hands, and Luminous Material

The dial is preserved in outstanding original condition.

• Original silver crosshair dial
• Completely untouched surface
• Beautifully preserved printing and markers

The luminous material on both the dial and the hands is original radium from the period.

Important details:

• The radium luminous material is still present on the hour markers and hands
• When tested with a Geiger counter the lume shows active radioactivity, confirming its originality
• The color and texture remain consistent with untouched vintage radium

Original radium lume that remains intact on both dial and hands is highly desirable among vintage collectors.

Condition

This watch is preserved in excellent collector condition.

• Stainless steel Oyster case with sharp edges
• Very well preserved surfaces
• Original dial and hands
• Movement fully serviced in February 2026
• Running exactly as it should

The watch remains honest, original, and untouched.

Complete Set

An additional highlight of this example is the remarkable completeness of the set.

The watch includes:

• Original Rolex presentation box
• Original chronometer certificate Dated May 1959 and April 1960
• Original Rolex warranty Dated May 1960
• Period correct expandable bracelet dated Feb 1960

The watch was originally sold on May 21, 1960 by Boyd Park Jeweler, a respected retailer of the period. The business continues to operate today under the name Bennion Jewelers in Salt Lake City, Utah.

Finding a vintage Rolex from this era with such a complete set is exceptionally rare.

The Bracelet

The watch is fitted with its period correct expandable bracelet.

Features include:

• Early 1960s expandable design
• Stainless steel construction
• Extremely well preserved
• Virtually no stretch
• Virtually no stretch
• Dated 2^/1960
• Will fit up to 6.75 inc

Expandable bracelets were extremely popular during the late 1950s and early 1960s because they allowed comfortable wear without adjusting links.

Why This Watch Is So Special

This particular example stands out for several important reasons.

• One of the rarest Rolex references ever produced
• Original caliber 1040 Tru Beat movement
• Extremely unusual dial without Tru Beat text
• Smooth sweeping seconds rather than deadbeat seconds
• Believed to be among the last examples produced
• Complete original set with box, papers, and certificate
• Original radium luminous material confirmed active
• Sold in 1960 by Boyd Park Jeweler
• Fully serviced and working perfectly

For collectors of rare vintage Rolex watches, unusual transitional configurations like this represent some of the most fascinating and desirable pieces.

Final Thoughts

The Rolex Oyster Perpetual Tru Beat reference 6556 already occupies a special place in Rolex history. Yet this example pushes rarity even further.

A late production piece with the correct caliber 1040 movement but without the Tru Beat designation on the dial is almost unheard of. Combined with its original radium lume, complete documentation, original bracelet, and excellent condition, this watch represents a truly exceptional collector piece.

Discoveries like this highlight the endless fascination of vintage Rolex collecting and the rare surprises that can still surface more than 60 years later.

Most known examples of the Rolex Tru Beat Ref. 6556 have a 1956 case back stamp. Research of publicly sold pieces shows the same production year appearing repeatedly across different serial numbers.

This suggests that Rolex produced the majority of Tru Beat cases during a limited production run around 1956 and continued assembling and selling them over the following years.

A similar situation is known with the Rolex Commander, where watches were sold for several years even though many share the same case production date.

In this example, the original guarantee card is dated May 21, 1960, while the official Swiss chronometer certificate is dated May 14, 1959 and April 1960. The bracelet dated 2 1960.

These documented dates indicate that the watch was certified and ultimately sold in 1960, which is why this watch should be dated 1960 rather than the earlier case production year.