Conn hard cases

[ghan03]

Hi,
Just wondering if anything knows when the design was updated for the Conn hard cases that come with e.g. the 88H/110H? The 88H I purchased circa 2016 came with a case which largely had a more rubberised finish than the current case, which is more plastic-feeling. I'm asking as I'm trying to roughly date a 110H bass with sn 574149 and I haven't had much luck. Only looks to be a few years old and has the more plasticky finish case.
Thanks!