Step 2: Movement & Model The Seiko movement and model number can be found on the caseback in two sets of 4 digits joined by a dash.
The first 4 are the movement calibre number, the second four are the case/model number.
Some American watch brands did not use a consistent series of serial numbers, but most of the big manufacturers did.
Rolex Omega Cartier Tag Heuer IWC Breitling Rotary Longines Piaget Other Makes Diamond Set Under 100 Rolex Omega Cartier Tag Heuer Rotary Longines Other Makes Diamond Set Under 100 Gold Pocket Silver Pocket Clocks Diamond Rings Rings Over 100 Rings Under 100Seikos have the date of manufacture written into the serial number which is engraved on the back of the watch also the movement-model numbers are also engraved onto the case back.The first number represents the year and the second number (or letter) represents the month (1-9 for Jan.-Sept.All modern Seiko watches have the date of manufacture contained in the 6 digit Serial number.Exceptions are pre-1970 models when the numbers were 7 digits long, and limited edition models may have a number reflecting it's piece number e.g. Also check that the engraving is neat, evenly spaced, aligned and features sharp edges.Based in Nagoya, Aichi, Japan, Hoshino Gakki were one of the first Japanese musical instrument companies to gain a significant foothold in import guitar sales in the United States and Europe, as well as the first brand of guitars to mass-produce the seven-string guitar and eight-string guitar.
The Hoshino Gakki company began in 1908 as the musical instrument sales division of the Hoshino Shoten, a bookstore company.and Fuji Gen Gakki guitar factories to manufacture Ibanez guitars, and after the Teisco guitar factory (Teisco String Instrument, Company) once closed down in 1969/1970, Hoshino Gakki used the Fuji Gen Gakki guitar factory to make most Ibanez guitars.In the 1960s Japanese guitar makers started to mainly copy American guitar designs and Ibanez branded copies of Gibson, Fender and Rickenbacker models started to appear.You should consult the serial number table for the specific brand of watch movement you are trying to date by selecting a company from the menu on the left.Not all vintage watches can be dated using the serial number.Also check that the engraving is neat, evenly spaced, aligned and features sharp edges.