Tissot PRC 100 Solar (Reference P650/750)
Sports/Tool Watch (Solar Quartz) · Tissot (Swatch Group); Entry-level luxury/Mid-range Swiss brand known for high volume and technical innovation.
Period: Modern (Late 1990s - Early 2000s). The design features a Neo-Genta influence with its dodecagonal (12-sided) bezel and integrated-lug aesthetic common in late 20th-century sports watches.
Type
Sports/Tool Watch (Solar Quartz)
Brand
Tissot (Swatch Group); Entry-level luxury/Mid-range Swiss brand known for high volume and technical innovation.
Movement
Swiss Solar Quartz (likely ETA E03.001 or similar early Swiss solar caliber); features light-charging technology with approximately 2-4 months power reserve once fully charged.
Dimensions
38mm-39mm diameter, 10mm thickness, 44mm lug-to-lug, 20mm lug width. It wears slightly larger due to the angular case shape.
Description
The Tissot PRC 100 Solar is a robust, everyday sports watch that blends the versatility of a tool watch with a unique geometric design. Its 12-sided bezel provides a distinctive silhouette, while the solar-powered movement offers 'set-it-and-forget-it' reliability. It serves as a precursor to the modern integrated sports watch trend and Tissot's current T-Touch solar innovations.
Key Features
Solar-charged dial, dodecagonal bezel, PRC (Precision, Robustness, Chic) designation, and 100-meter water resistance.
Dial Description
Matte navy blue dial with solar cell integration; applied rectangular luminous indices (double at 12, 6, 9), baton hands with luminous inserts, and a date window at 3 o'clock.
Case Material
Brushed 316L Stainless Steel with a polished finished bezel edges for contrast.
Crystal Type
Flat Scratch-Resistant Sapphire crystal.
Bezel Details
Fixed 12-sided (dodecagonal) stainless steel bezel with a brushed top surface and polished faceted edges.
Crown & Pushers
Screw-down crown for water resistance with Tissot 'T' branding; no guards.
Bracelet or Strap
Blue integrated-style Tissot branded rubber/silicone strap with a standard steel tang buckle.
Caseback Details
Solid screw-down stainless steel case back with Tissot branding, reference number P650/750, and 'Sapphire Crystal' / '100m' engravings.
Movement Type
Swiss Solar Quartz (likely ETA E03.001 or similar early Swiss solar caliber); features light-charging technology with approximately 2-4 months power reserve once fully charged.
Water Resistance
100 Meters (10 ATM). Suitable for swimming and snorkeling; not recommended for deep-sea diving or high-pressure water sports without recent pressure testing.
Origin & Provenance
Swiss Made; Manufacture in Le Locle, Switzerland. Movement is a Swiss-made solar quartz caliber.
Age Estimate
Circa 1998-2005. This was an early attempt by Tissot to compete with Japanese solar technology (Citizen Eco-Drive).
Cultural Significance
A bridge between 1970s angular design and early 2000s tech-forward watchmaking. It reflects the era when Swiss brands began reclaiming the quartz/solar market from Japan.
Condition Notes
Very Good. Visible minor surface scratches on the brushed bezel; strap appears to be an original replacement; dial and hands show no signs of moisture damage or fading.
Value Estimate
$150 - $250 USD. Value is driven by condition and the functionality of the solar cell, which can be difficult to source for older Swiss calibers.
Care & Maintenance
Requires regular exposure to light (avoid drawers); replace water resistance gaskets every 3-5 years. Solar capacitors eventually need replacement every 10-15 years if the power reserve drops.
Similar Watches
Citizen Eco-Drive Promaster, TAG Heuer Professional 2000 (Quartz), and Tissot PRX (Modern Quartz version). The PRC 100 is less integrated than a PRX but more geometric than a standard diver.
Interesting Facts
The PRC 100 was one of the few Swiss-made solar watches of its time, as the technology was dominated by Seiko and Citizen. It represented Tissot's commitment to the 'PRC' design philosophy which continues today in the PRS and PRX lines.