Tonbo Research ยท Guides
JDM watch buying guides for collectors
Research on why Japanese prices are lower than US market, how to buy through Buyee, and what to look for in specific references. Companion to The Snowflake weekly newsletter.
Why JDM Watches Cost Less Than US Market
Why vintage Japanese watches sell 15-50% below US market prices. The structural forces behind JDM pricing and what they mean for collectors buying from Japan.
How to Buy Vintage Watches from Buyee
Step-by-step guide to buying from Buyee, Japan's leading proxy shopping service. Fees, shipping, customs, common mistakes, and how to verify whether a JDM price is actually a good deal.
Seiko SARB033 Buyer's Guide
Discontinued in 2018, the SARB033 is one of vintage Seiko's most-watched references. Buyer's guide: pricing, comparison with SARB035, common issues, where to find one.
Why JDM Watches Are Mispriced
Why the 15-50% price gap between Japanese and US watch markets persists. Yen weakness, behavioral pricing lag, and information asymmetry explained for collectors buying JDM watches.
Spring Drive Grand Seiko: A Complete Comparison
Grand Seiko's Spring Drive movement powers the most coveted modern Snowflakes. Comparison: SBGA011 (discontinued) vs SBGA211 vs current. Pricing, value, and which to buy in 2026.
Citizen Attesa AT8040 Buyer's Guide
Citizen Attesa AT8040 (AT8040-57E) buyer's guide. Current US median $395. JDM pricing, condition grading, arbitrage math, and where to find one in Japan.
G-Shock metal square (2018-) Buyer's Guide
G-Shock metal square (2018-) (GMW-B5000) buyer's guide. Current US median $336. JDM pricing, condition grading, Japan vs. US price comparison, and where to find one.
G-Shock Rangeman (2013-) Buyer's Guide
G-Shock Rangeman (2013-) (GW-9400) buyer's guide. Current US median $230. JDM pricing, condition grading, arbitrage math, and where to find one in Japan.
G-Shock GW-M5610 atomic (2010-) Buyer's Guide
G-Shock GW-M5610 atomic (2010-) (GW-M5610) buyer's guide. Current US median $110. JDM pricing, condition grading, Japan vs. US price comparison, and where to find one.
Casio G-Shock MT-G MTG-B1000 Bluetooth Solar Buyer's Guide
Casio G-Shock MT-G MTG-B1000 Bluetooth Solar (MTG-B1000) buyer's guide. Current US median $585. JDM pricing, condition grading, arbitrage math, and where to fin
Casio Oceanus Manta S7000 Series OCW-S7000 Buyer's Guide
Casio Oceanus Manta S7000 Series OCW-S7000 (OCW-S7000) buyer's guide. Current US median $1,075. JDM pricing, condition grading, arbitrage math, and where to fin
Casio Oceanus Classic Line OCW-T2600 Multi-band Buyer's Guide
Casio Oceanus Classic Line OCW-T2600 Multi-band (OCW-T2600) buyer's guide. Current US median $551. JDM pricing, condition grading, arbitrage math, and where to
Citizen Promaster Fujitsubo Mechanical Diver Buyer's Guide
Citizen Promaster Fujitsubo Mechanical Diver (NB6021) buyer's guide. Current US median $425. JDM pricing, condition grading, arbitrage math, and where to find o
Citizen Promaster Mariner Buyer's Guide
Citizen Promaster Mariner (NY0085) buyer's guide. Current US median $232. JDM pricing, condition grading, arbitrage math, and where to find one in Japan.
Citizen Promaster Mariner Black Buyer's Guide
Citizen Promaster Mariner Black (NY0086) buyer's guide. Current US median $195. JDM pricing, condition grading, arbitrage math, and where to find one in Japan.
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