This is a used Seiko watch "Roadmatic" men's. Among the numerous LM series, the 5140 is the smallest size. The maintenance history is unknown, but it is currently moving with a high accuracy of about +0.5 seconds per day. The time graph at the end of the photo is a reference value for simple measurement of the smartphone app and horizontal placement.
It is not a guaranteed value. There is no rocking lever failure, which is a drawback of the 56 series caliber, and the calendar can be fast forwarded for both the day of the week and the date. From the serial number, I guess it was manufactured in April 1971 (Showa 46).
All my products are 100% Authentic. Contact me if you have any questions. International Buyers - Please Note. This item is in the category "Jewelry & Watches\Watches, Parts & Accessories\Watches\Wristwatches". The seller is "japan-shopping-store" and is located in this country: JP.This item can be shipped worldwide.