diff --git a/README.md b/README.md
index 827a76a..46100a1 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,7 @@ Decoding the Dymo 450 string using uint-16-le yields "17100616184230", whereas t
 
 The physical labels found on the Dymo 450 include "1740021750110" and another "1750110". The physical labels on the Dymo-TT are "93085-2053234" and "06440293085". It seems the digital "serial" numbers don't match the physical serial numbers marked. However, the digital serial ID is still unique for each device.
 
+A second Dymo-TT connected previously reports `〰㘀　㠀\xe3\x84\x80㈀\xe3\x84\x80㐀㐀㔀㔀㌀㔀㤀` as the device SerialNumber as recorded in the kernel log. It's unknown what the actual binary value should be from this.
 
 ```python
 # from pyUSB