The verichrome spool could very well be the same as a 103 spool. I don't have one to compare it with. When I measured that one, I couldn't find my caliper and used an old machinist ruler to measure it. 3 15/16" is 3.9375", the .0255" difference is less than 1/32" - well within the margin of error on my ruler.
I would have to guess that your older spool and this one are exactly the same.