IMO this is a recently made blade (end of 20th century) so the style should be rather identified as kamardikan or Tuban putran (replica) if you wish. Of course other opinions are welcome
. Also the pamor pattern looks more like Raja Abala Raja (King of the Kings) rather than Ujung Gunung, but it is not perfectly executed (weld flaw).
Regarding the use of plastic wrap for preserving the blades, I also don't use it as it it not required ind a dry environment like in Europe and I keep my blades into their scabbards. The
single occurrence of slight blade rusting which I experienced was because the scabbard was new and the wood not fully dry so the moisture affected the blade. I always carefully drench my blades with WD40 upon receipt and wipe the excess, and occasionally apply cendana oil for improving the smell if required.
Regards