LK 93 - what kind of breech plug and how old?

[tidmarshsmiths5]

Take a look at pics; if I need better quality I can get digital camera out.

This is a Knight LK 93 I picked up from a buddy of mine who bought it used, never shot it - took me 3 hours this morning to get the breech plug out after soaking it all night in hot water and then PB Blaster spraying this morning and then using a 3ft steel bar on top of my vise grips with my 200lb son standing on the barrel to get it out...wow, people need to clean their equipment before putting them away!

Serial number is 1108xx

[tidmarshsmiths5]

Mfg# 900045

This is the part they used - a Bighorn breechplug into this LK 93 so that 209s can be shot - found in the owner's manual online...