They are HKS
but the "MK1" Super sequential Valve
they provided a HKS Gold sticker to go over the HKS SSQVs to start with, then started to "emboss" on to the later ones (same shape as those) so they must be about 4 years old ish.
i cant tell by your photos because they are not the best, but one looks like it has the optional gold fin insert
prob why it was wound in more...
wont make much of a difference
best to strip them down, clean them then put them back together.