Everyone is on the money. In conjunction with what Bindi2 is referring too, the easily recognised police marked hooks are the Queensland Police marked ones. These are of Britishicon manufacture and are usually just marked on the pommel Q^P over a three digit number. Skennterton and Richardson's book, British & Commonwealth Bayonets details the British manufacturer "Mole" as the supplier, however, in recent years other suppliers have been noted but that will need to be the subject of another thread.

Getting back to the question by Bigduke6 as to why serial numbers and markings were never removed or cancelled out. Bindi is right but for some unknown reason during refurbishment of bayonets old markings were again never removed. If you look closely at Bigduke6's photos his 1918 Lithgowicon in a 1942 scabbard is indeed correct as it appears to me to have been factory refurbished at some time and guessing before 1945 and probably at Orange. The finish is dark and reminicent of the early years of WW2 refubishing and not like that deep rich blue of the 1918 period at Lithgow. Also you need to study the proof marks on the ricasso "A inside Star" then on the other side; the shield, Lithgow and the date all show signs that they have been sanded back as they are not that sharp as they once would have been when first issued. Cleaned back but not removed.

Bigduke6 you have an excellent bayonet in fantastic condition and one that would suit Chris's rifle perfectly. I would be surprised if he doesn't make contact.