Where is the model/serial number on my Philips shaver? Published on 2017-04-25 You can find the model number on the backside of your Philips shaver. For the serial number, check the backside, under the pop-up trimmer or in the hair chamber. Serial number format The serial number consists of 9, 6 or 5 digits. Format 9 digits: 5-YYWWD Format 6 digits: YYMMD Format 5 digits: YYWWD
