Seiko Seikomatic-R 8305-1010 (1965)

Now available at auction from Second Vintage This classic vintage Seiko automatic presents an excellent opportunity to acquire a standard production Seikomatic-R from 1965. Notable for its sleek 38 mm case profile, hidden crown at the 4 o'clock position, and distinctive curled lugs reminiscent of the Grand Seiko 62GS, this timepiece is powered by a 30-jewel automatic movement and offers substantial mid-century wrist presence. Brand: Seiko Model: Seikomatic-R Reference Number: 8305-1010 Serial Number: 5N39732 Movement: Automatic, caliber 8305, 30 jewels Dial: Silver sunburst with applied faceted indices and date display Case Size: 38 mm (excluding the crown) Case Material: Stainless steel Production Year: 1965 Condition: Good vintage condition. Timegrapher: -30-32s/day, running strong and steady. Dial and Hands The watch presents an attractive silver sunburst dial accented by applied faceted indices. While the main surface remains clean, there is a localized flaw in the form of visible brown staining and residue at the bottom edge of the date window frame. The dial is paired with dauphine style hands that exhibit visible oxidation and spotting across their surfaces, contributing to the aged character of the timepiece. Case and Crystal The 38 mm stainless steel case is distinguished by its sleek profile and curled lugs that echo the geometry of the 62GS. It features a smooth polished integrated bezel and a distinctive dolphin motif on the caseback. Honest vintage wear is present, with moderate surface scratches and handling marks found throughout the case and bezel. The domed acrylic crystal shows light surface scratches and scuffs visible under direct light. A hidden, unsigned crown with a knurled edge and flat face is recessed neatly at the 4 o'clock position. Movement Inside beats the Seiko caliber 8305, a 30-jewel automatic movement. The mechanism displays clean plates and bridges, with the rotor present and intact. Engravings for Seiko and the jewel count are clearly visible, while minor wear is noted on some screw heads. The caliber 8305 is a non-hacking movement that conveniently allows the quickset date mechanism to be adjusted both forwards and backwards. Testing on the timegrapher records -30-32s/day. Performing well within expected vintage tolerances; running strong and steady. Strap The watch is fitted with a period correct bracelet constructed from folded stainless steel links, secured by an unsigned fold-over clasp. The vintage folded bracelet shows surface scratches and wear consistent with the rest of the watch, and accommodates a maximum wrist size of 18 cm. Condition Good vintage condition. The stainless steel case and bezel show moderate surface scratches and handling marks, reflecting honest wear. The silver sunburst dial remains largely clean, though it bears a localized area of brown staining at the bottom edge of the date frame, and the dauphine hands display visible oxidation. The period correct folded bracelet exhibits surface scratches and wear. The movement is clean and intact, and supported by the timegrapher reading of -30-32s/day, it is performing well within expected vintage tolerances; running strong and steady. Dimensions The case measures 38 mm in diameter (excluding the crown). Remarks This classic vintage Seiko automatic offers a compelling 1965 Seikomatic-R design with a generous 38 mm case. The combination of its sleek profile, curled lugs, and the 30-jewel caliber 8305 makes it an attractive and characterful addition to any collection. History The Seikomatic-R line represents a significant era of Seiko's automatic watch production in the 1960s. The reference 8305-1010 is notable for its 38 mm case diameter and distinctive curled lugs, a design trait it shares with the celebrated Grand Seiko 62GS. Powered by the caliber 8305, this model features a date-only display with a framed aperture and a practical quickset date mechanism that can be adjusted in both directions, making it a highly capable and visually striking timepiece from Seiko's mid-century catalog. / Second Vintage SKU: SEI-MDN-0002