Edwin Jagger Knot Size?

[jtadmin]

So I am sure I could measure the brush but I was wondering if the information on the serial number is enough to figure knot size? I am wondering if this is a 19mm brush based on the 19 in the serial number? Checked the wiki, googled and no luck.

Edwin Jagger 1ej946sds

 

[40boy]

EJ Medium Best is a 21mm knot as listed HERE

 

[jtadmin]

Thanks Scott!