Citizen Cosmotron (Vintage Electronic, 1970s) (7800, 7802, 7803, 7804, 4-790xxx, 4-480xxx, GN-4W-S) , Current Prices, JDM Listings, Market Analysis
The Citizen Cosmotron is a vintage electronic watch from the 1970s, produced across several reference numbers including the 7800, 7802, 7803, 7804, and case-code families 4-790xxx and 4-480xxx. It sits within a niche but active segment of JDM vintage collecting, where early electronic and tuning-fork-era timepieces have drawn steady attention from buyers who prioritize technical history over mainstream name recognition. Tonbo tracks the Citizen Cosmotron (Vintage Electronic, 1970s) 7800 and related references because Japanese flea market supply remains meaningful and the US-Japan price gap creates periodic buying opportunities. At a current US median of $210, this is a mid-tier vintage JDM target that warrants disciplined sourcing.
Current US Market Value
The US median price for the Citizen Cosmotron sits at $210, with the middle half of observed transactions falling between $99 and $285. That spread is wide, which reflects real condition variance across a decades-old electronic platform rather than speculative volatility. It is worth being direct about the data foundation here: this pricing is drawn from a sample size of 8 transactions, and comp quality is rated 🟡 Limited. That means the $210 figure is a reasonable directional anchor, but it should not be treated as a tight market consensus. If you are researching 7800 price levels for a specific variant or condition grade, treat the p25-p75 range as the more honest frame than the median alone.
Active JDM Listings
The current Japan market snapshot shows six active Yahoo Flea listings for the Cosmotron family, all dated June 10. The range is unusually wide, from a worn daily driver priced around ¥10,200 to new-old-stock examples listed at ¥39,800. This kind of spread is typical for JDM vintage electronics, where condition tiers are often described in seller language rather than standardized grades. For buyers looking at Citizen Cosmotron (Vintage Electronic, 1970s) 7800 for sale through Japanese channels, the current listings cover most of the condition spectrum simultaneously.
- ¥10,200 on Yahoo Flea , described as a little damaged and dirty
- ¥11,000 on Yahoo Flea , described as showing no noticeable scratches or stains
- ¥12,800 on Yahoo Flea , described as damaged and dirty
- ¥29,000 on Yahoo Flea , described as close to unused
- ¥39,800 on Yahoo Flea , listed as new (two separate listings at this price)
Recent Alert History
No strict or opportunity alerts have fired for the Citizen Cosmotron in the past 90 days. This does not mean the model is inactive, it means no listings have crossed Tonbo's threshold filters for price-to-market ratio during that window. Given the limited comp sample and the wide condition range visible in current JDM listings, this is partly a data depth issue. Models with thinner comp bases require more observed transactions before alert thresholds calibrate reliably. You can review how Tonbo's alert tiers are structured at tonbomarket.com/signals.
Japan vs. US Price Gap
At current exchange rates, the Japanese listings range from roughly $65 to $260 USD, which maps closely onto the US p25-p75 range of $99 to $285. The overlap is tighter than many JDM models, which suggests that aware buyers have already been arbitraging this gap or that US demand for the Cosmotron remains thin enough that prices have not separated cleanly. The main risk when you buy 7800 Japan is condition opacity , seller descriptions on Yahoo Flea use qualitative language that does not always translate predictably, and electronic movements of this era can show hidden service needs that are not visible in listing photos. The limited comp base adds a second layer of risk, since fair value for any specific variant is harder to confirm with only 8 reference transactions in the dataset. Tonbo's deals page surfaces models where the Japan-to-US gap is more structurally defined.
Track Citizen Cosmotron (Vintage Electronic, 1970s) on Tonbo
Tonbo monitors JDM listings across Yahoo Flea and other Japanese platforms daily, cross-referencing against US market comps to flag when prices diverge meaningfully. You can add the Citizen Cosmotron and up to four other models to a free watchlist at tonbomarket.com/dashboard under the Collector tier, no credit card required. For real-time Discord alerts when a specific model crosses a price threshold, the Member tier runs $10 per month. Given the current alert drought on this reference, the free tier is a reasonable place to start while the comp base builds.