Vintage Lear Siegler Spoiler S-80 Red Glitter Motorcycle Helmet size (large?)

Description

Vintage Lear Siegler Spoiler S-80 Red Sparkle Motorcycle Helmet Size (Large?).
I wear a large and this fit
my
head with plenty  of room to fit a new helmet liner. There is no helmet liner in the helmet .
There is
no marking for
the size
, so my best guess is it is a large.
The Head liner needs to be replaced .The original one dried out form age.
Please view all photos for condition.