Style 1b: 01121013609 -or-
Description: Eleven (11) or twelve (12) digit Serial number (All numbers). May have hyphen followed by 4 more digits. Similar to style 1a above; however, this style designates manufacture week instead of month. This style is typically found on units manufactured within the last decade or so (+/-).
Year of manufacture is last two numerical digits. (see Note below)
Week of manufacture (for newer units) is two digits preceding the year numerical digits.
For older units (pre-2000 +/-), the digits preceding the year will represent month of manufacturer rather than week.
**NOTE**: Some similar styles may have eleven (11) or twelve (12) digits followed by a hyphen (-) and four (4) more digits. The year of manufacture will remain coded in the first 11 or 12 digit sequence. NOT the last four digits after the hyphen.