Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380
How might this watch look on my wrist? A 3D representation of Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380. Check retailer page for actual dimensions and specifications.
Scroll or drag to turn the wrist. Shown to scale on a typical men’s wrist (17.5 cm), lug to lug 47 mm (measured from the photo).
This radio-controlled Eco-Drive watch houses Citizen's new calibre H874 movement, marking the first light-powered timepiece with a fully analogue moon phase complication. The movement calculates lunar phases via multi-band radio signals using Citizen's proprietary Luna Program algorithm, displaying the result at six o'clock with ±15 seconds monthly accuracy. The 43mm Super Titanium™ case houses a distinctive dial featuring red surface detail against a black outer ring, with a date window at four o'clock. Water resistant to 10 bar, the watch powers from any light source, including moonlight, eliminating the need for battery replacement.
The Super Titanium™ case material offers exceptional strength whilst maintaining a lighter weight than stainless steel. A matching Super Titanium™ bracelet completes the watch, secured with a fold-over clasp. This represents a significant technical achievement in combining radio synchronisation with lunar phase indication in an Eco-Drive platform, celebrating three decades since Citizen introduced radio-controlled wristwatches to the market.
The Citizen Moon Phase BY1018-55X is listed on WatchShopper as a men's 43 mm titanium solar watch with a red dial, a date display, a world time display, a moon phase, a perpetual calendar, sapphire crystal, and 100 m water resistance. It runs on the H874 calibre and comes on a titanium bracelet. On 27 October 2026 the lowest UK price was £699.00 at Beaverbrooks, in stock, with free delivery and 30-day returns. 3 UK retailers have it in stock, all at £699.00. With the voucher code EXTRA10, Goldsmiths brings it to £629.10.
WatchShopper has tracked the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380 across 3 UK retailers for 35 days. In that time the lowest recorded price was £699.00 at F.Hinds on 22 September 2026, and the highest was £699.00 at F.Hinds. The average tracked price is £699.00.
| Lowest tracked price | £699.00 |
|---|---|
| Highest tracked price | £699.00 |
| Average tracked price | £699.00 |
| Current best price | £699.00 |
| Tracking since | 22 September 2026 |
At £699 this watch is among the dearest for a men's solar watch with a 41–45 mm case: 88% of the 201 we track from every brand cost less. 96% of the 359 Citizen watches we track cost less than this one. This is the cheapest of the 3 versions of the Moon Phase we list.
Where is the cheapest place to buy the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380?
The cheapest price for the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380 is £699.00 from Beaverbrooks. We compare prices from 3 UK retailers.
Which UK retailers stock the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380?
The Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380 is available from Beaverbrooks, F.Hinds, Goldsmiths. Prices range from £699.00 to £699.00.
What is the cheapest the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380 has been?
The lowest price we have recorded for the Citizen BY1018-55X Super Titanium™ 'Tsuki-Yomi' Moon Phase Watch - W38380 is £699.00 at F.Hinds on 22 September 2026. We have tracked this watch for 35 days, over which it has ranged from £699.00 to £699.00.
