Scottish Sword

[Miguel]

Hi Everyone,
I have what I believe to be an 1828 Patt Scottish cross hilt sword in a steel scabbard. The straight double edged blade is etched along its length with thistles and foliage, KOSB, which I take to mean Kings Own Scottish Boarderers, and a crown but no letter to denote which king. The ricasso has the star of david with the proof mark on one side and the military outfitter on the other i.e.Henderson, 14, West Nile St, Glasgow.
O/L without scabbard is 39.5 ins.
Blade length is 33 ins.
Blade width at ricasso is 1.125 ins.
I would appreciate any comments you may have particularly regarding approx. age and what King in view of the absence of a royal cypher. From my own research I discovered that the military outfitter appeared to cease trading in Glasgow in the late 19thC.
Regards.
Miguel