Seiko SQ, Ref. 5Y23-8240, Cal. 5Y23, Men’s Quartz Analog

A wide weekday window beneath 12 o’clock distinguishes this 1990 Seiko SQ Ref. 5Y23-8240 from a conventional paired day-date layout. A separate date sits at 3 on the silver dial, framed by two-tone applied markers and gold-tone hands. The 37 mm steel case with gold-plated accents retains its original Seiko B1754-E bracelet.

Silver Dial with Separate Day and Date Windows

The light silver finish has a restrained radial texture. Rectangular applied markers combine gold-tone borders with darker inner sections, creating contrast against the pale surface. A fine printed minute track surrounds the display, with SEIKO and QUARTZ beneath 12 and the SQ emblem above 6.

The wide framed weekday aperture sits below the upper signatures, while a separate date window occupies 3 o’clock. Cal. 5Y23 provides quick-set day-date adjustment. Gold-tone hour and minute hands and a slender central seconds hand complete the display, which remains clean and legible.

Steel Case and Original B1754-E Bracelet

The stainless-steel case with gold-plated detailing measures 37 mm across and 42 mm lug to lug. Brushed upper surfaces contrast with broad polished flanks, while rounded shoulders and the close bracelet transition give the watch a smooth sports-dress profile. A ridged gold-tone crown at 3 o’clock coordinates with the dial and bracelet accents.

The original Seiko B1754-E bracelet has broad steel outer links and gold-tone center elements. Its articulated construction continues the two-tone design from the case. The 19 mm connection creates a neat transition without making the compact case appear narrow.

Light age-related wear remains visible on the case and bracelet. The bracelet is adjustable, although an exact fitted wrist circumference is not supplied.

Seiko 5Y23 Quartz and Serviced Condition

Seiko Cal. 5Y23 is a Japanese quartz movement providing analogue timekeeping and a day-date calendar. Battery-powered operation avoids a regular winding routine while retaining the familiar three-hand format.

The watch is fully serviced and fully operational, with its original watch components retained. It is supplied with a 12-month warranty and no box or papers.