This Swiss Model 1957-90 bayonet made by Waffenfabrik Bern is in very good condition. The blade markings indicate the blade was supplied by Wenger. This appears to be a later model from the 1970s for the STGW57 rifle / Sturmgewehr 57 / PE57 series rifles. This model is designated 1957-90 reflecting an older 1970s bayonet paired with the scabbard and frog from the 1990s.
Photos are representative of the condition you will be receiving. May not be guaranteed to match the exact markings and condition.