Casio is arguably the undisputed champion of "good inexpensive watches." They offer a vast range of models, from classic digital watches like the iconic F-91W to surprisingly stylish analog and digital-analog combinations. Casio watches are known for their incredible durability, accuracy, and long-lasting battery life.

Key Models to Consider: F-91W, A168, AE-1200WH (Casio Royale), MRW-200H, MQ-24

Timex has been a household name in American watchmaking for over a century. They offer a wide variety of styles, from classic dress watches to rugged field watches. Their Indiglo backlight feature is a particularly useful and recognizable feature.

Key Models to Consider: Weekender, Easy Reader, Expedition Scout, Marlin (mechanical - may be slightly above $100 but worth considering), Ironman

While Seiko is renowned for their high-end Grand Seiko models, they also produce excellent entry-level watches that offer incredible value for money. Look for models with Seiko's in-house quartz movements, known for their accuracy and reliability. While true mechanical Seiko's under $100 are rare, pre-owned or sales can offer a gateway into mechanical watch ownership. Note that many Seiko 5 models are often found slightly above $100, but still represent great value.

Key Models to Consider: Seiko 5 (look for sales or pre-owned), Seiko SUR series (quartz), Seiko Essentials

Citizen is another Japanese powerhouse known for its innovative Eco-Drive technology, which uses light to power the watch. This eliminates the need for battery replacements, making them incredibly convenient and environmentally friendly. While many Eco-Drive models are above $100, you can often find entry-level options within that budget.

Key Models to Consider: Citizen Eco-Drive Corso, Citizen Quartz models

• Invicta: Known for bold designs and affordable automatic movements (quality can vary, so do your research).
• Skmei: Ultra-budget digital watches with surprising features (ideal for sports or everyday wear).
• Daniel Wellington: Minimalist designs with interchangeable straps (fashion-focused, but often available at discounted prices).
• Orient: (Often slightly above $100 but worth considering) Known for their in-house automatic movements and classic designs.

The movement is the heart of the watch. Quartz movements are battery-powered, highly accurate, and require minimal maintenance. They are the most common type found in inexpensive watches. Mechanical movements (automatic or hand-wound) are powered by a spring and gears. They are more complex and require regular servicing, but many enthusiasts appreciate their craftsmanship and history. While finding a good mechanical watch under $100 can be challenging, it's not impossible, especially if you consider pre-owned options.

The case protects the watch's internal components. Common materials include:

• Stainless Steel: Durable and resistant to corrosion. A good choice for everyday wear.
• Resin/Plastic: Lightweight and affordable. Often used in digital and sports watches.
• Base Metal: Less durable than stainless steel and more prone to scratches and tarnishing. Avoid if possible.

The crystal protects the watch face. Common types include:

• Acrylic: Inexpensive and shatter-resistant, but easily scratched. Can often be polished.
• Mineral Crystal: More scratch-resistant than acrylic. A good balance of durability and affordability.
• Sapphire Crystal: The most scratch-resistant option, but typically found on more expensive watches.

For inexpensive watches, mineral crystal is generally a good choice.

Water resistance is crucial, especially if you plan to wear your watch while swimming or participating in water sports. Be aware that water resistance ratings are often tested in laboratory conditions and may not reflect real-world usage. Look for at least 50 meters (5 ATM) for basic water resistance (splashes, rain) and 100 meters (10 ATM) for swimming and snorkeling. Avoid wearing watches with "water resistant" or "30M" ratings in the water.

The strap significantly impacts comfort and style. Common materials include:

• Leather: Classic and stylish, but requires more care and maintenance.
• Rubber/Silicone: Durable, water-resistant, and comfortable. Ideal for sports and outdoor activities.
• Nylon (NATO): Versatile, affordable, and easily interchangeable. Offers a sporty and casual look.
• Stainless Steel: Durable and stylish, but can be heavy and uncomfortable for some.

Dress watches are typically minimalist with clean dials, slim profiles, and leather straps. They are designed to be worn with formal attire. Look for models with a simple case design and a classic dial layout.

Field watches are designed for durability and readability. They often feature a rugged case, a clear dial with luminous markings, and a durable strap (typically nylon or leather). Timex Expedition models are a great example.

Digital watches offer a range of functions, including alarms, stopwatches, and timers. Casio is the undisputed leader in this category.

Sports watches are designed for active lifestyles. They often feature water resistance, durable materials, and additional functions like chronographs (stopwatches) and compasses. Look for models with rubber or silicone straps and easy-to-read displays.

Minimalist watches are characterized by their clean lines, simple dials, and lack of unnecessary ornamentation. Daniel Wellington is a popular brand in this style, but many other brands offer similar options at various price points.