I bought a M-9 and was told it was made by Buck. The markings on it are "US" on the left ricasso and "M-9 UTILITY" on the right ricasso. It has an "old style" scabbard with sharpening stone embedded in the scabbard. It fact, it is a dead ringer for the one listed as "M-9 Utility, another blade for commercial sale before the military issues became available." on this link: http://www.old-smithy.info/bayonets/...variations.htm
What have I got and what is the general value. It is in excellent condition.
Iam no expert but i think your bayonet is made by LANCAY , it was made for the commercial market, the value is around $120 - 170 depending on the colour, green being the most common, hope this helps and enjoy your bayonet.