Seiko 7a28-7100 Quartz Chronograph Watch for Parts or Repair. Seiko 7a28-7100 Watch for Parts or Repair. This is to ensure the buyers know the state and conditions of VINTAGE watches. It does not include the Weekends/Public Holidays. Auctiva Offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With. Auctiva’s FREE Counter. The item “Seiko 7a28-7100 Quartz Chronograph Watch for Parts or Repair” is in sale since Sunday, October 08, 2017. This item is in the category “Jewelry & Watches\Watches, Parts & Accessories\Wristwatches”. The seller is “insatiable-fashionista” and is located in Singapore. This item can be shipped worldwide.