Seiko - SILVER WAVE - No reserve price - 5933-7020 Product Number:111245 - Men - 1971

Vintage 1870’s SEIKO Silver Wave 5933-7020 Analogue Quartz Men's Watch 3 Hands/Indexes Original Brand Metal Band New battery replaced Excellent condition
The SilverWave name dates back to Seiko’s early experiments in water-resistant watches （early 1960s） and evolved through the decades into various dress-and-sports hybrids. The 5933 family are quartz SilverWave models from around the late 1970s–early 1980s, produced in Seiko’s Daini factory; they kept the SilverWave identity (screw-down crown, wave logo on caseback on many examples) while adopting accurate quartz calibers for everyday reliability.
A refined vintage SilverWave from Seiko’s Daini era, the 5933-7020 blends classic 1980s slim quartz technology with SilverWave heritage. This example features the original silver/ivory Roman-index dial, clean dauphine hands, and a screw-down crown — a rare mix of dress refinement and vintage tool-watch cues. Powered by Seiko’s Cal. 5933 quartz (±15s/month), the movement offers the stability collectors expect with minimal service needs. A tasteful choice for the modern collector who values period correctness and everyday reliability.
■ Brand: Seiko SILVER WAVE
■ Model Number:5933-7020
■ Product Number:111245 Manufactured January 1971.
Seiko serial numbers are six digits long, with the first two digits indicating the year and month of manufacture. The first number（1）indicates the first year of the 1980s, meaning the watch was manufactured in 1981. The next letter （1） is the month code. For Seiko,1-9 represents January through September, O = October, N = November, and D = December. → "N" is November. Therefore, this watch was manufactured in January 1971
■ Technical features of the 5933movement:
• Details of Movement: Seiko caliber 5933 is an analog quartz watch movement. Production was in the 1980s.
• Sub-brands: Silverwave, Seagull
• Battery:SR721SW / 362 （Silver oxide） New battery was replaced this September 2025
• Accuracy:±15 seconds/month
• Day / date: Day + date
• Hacking: Yes
• Rate:32,768 Hz
• Number of jewels:6
• Size / diameter:22.0mm X-height:2.4mm
• Development division: Daini (Kameido, Tokyo, Japan)
• Notes: Same as cal. 5932 but with day display （as well as date）. Has a battery life indicator where the second hand moves in two-second intervals when the battery is low.
• PDF guides: Technical guide : 5933A
■Materials:
• Case: Stainless Steel
• Case Size:35mm excluding crown X 41mm including case lug Thickness: 8mm
• Dial Display: stylish sharp pencil-like bar and Roman numeral mixture Indexes and 3 hands display, analogue Calendar day and date
• Case Back: S Steel back case
• Total Weight:66.8gms
• Crystal: sapphire crystal
• Water-resistant: resistant for everyday life water dishing/showering but don't expect too much from it: Even if it was labeled "Water Resistant” at the time, it doesn't meet modern waterproof standards. Avoid using it around water.
• Diashock: Seiko's unique shock-resistant device that protects the balance wheel from
shocks, dramatically improving the accuracy and durability of watches. It is one of Seiko's
core technologies, first introduced in Marvel in 1956 and still used in current models such
as Presage.
• Band: Stainless Steel Seiko original Band 18cm circumference wrist length measured by tape
■Condition: There are scratches on the case, case back, band and the Crystal but very fine scratches not visible to the naked eyes. Lots of fine scars/scratches are in fact proof of real true antique vintage, as they cannot be avoided occurring after long term usage of half century. New battery was replaced this September 2025 It was functioning normally at the time of listing, so it should continue to function without any issues. Please be sure you are satisfied with the condition before bidding, so please check the photos and product description and ask any questions you may have (please note, however, that we may not be able to answer questions close to the end of the auction)
Note: As a vintage piece, the Seiko SILVER WAVE 5933-7020 is a worthy and charming watch — especially if you value heritage, design, and mechanical simplicity. It won’t match modern wristwatches for convenience, but it doesn’t need to: its strength lies in its history, elegance, and the spirit of mid-80s watchmaking.
■Operation and Use
• Time Setting: Pull the crown out one notch to rotate clockwise to adjust Date
Rotate crown counterclockwise for Week Day
• Time Setting: Pull the crown out two notches to rotate clockwise to adjust time-hours/minute
• Fast-forwarding the date and day of the week between 9:00 PM and 2:00 AM may cause malfunctions, so it is recommended to avoid operation in such hours


Comparison — SilverWave 5933 vs Seiko Sportmatic / Lordmatic / 5 Actus （overview）
Seiko SilverWave (5933, quartz)
Quartz, high accuracy, lower mechanical servicing needs, often screw-down crown and modest water resistance in the SilverWave family; a practical vintage quartz daily watch with a neat dressy/sport look.
Seiko Sportmatic / Sportsmatic 5 (mechanical automatics: e.g., calibers like 6619）
Introduced in the early 1960s as Seiko’s accessible automatic day-date family （the ancestor to the modern Seiko 5）. Mechanical, hand-on-wrist character, requires periodic servicing; valued for classic vintage feel. If you want an original 1960s mechanical daily wearer, a Sportsmatic is the pick.
Seiko LordMatic (mechanical automatics: e.g.,5606family)
More upscale than Sportsmatic: LordMatic models （late 1960s→1970s） commonly used higher-grade 56-series movements (23–25 jewels), better finishing and sometimes hi-beat variants — positioned just below King Seiko/Grand Seiko in Seiko’s old hierarchy. Best choice for collectors who want a refined mechanical vintage piece.
Seiko 5 Actus (7000/7019 etc., mechanical)
A 1960s–70s youth-oriented automatic line （Seiko 5 Actus） with reliable workhorse calibers （7009/7019 range）. Affordable, robust, and stylistically of the era — good balance of value and vintage charm.