They are hard to make out but i think both crowned stamps on the spine are for Wilhelm ll the W being prussia and the other possibly wuttenburg but that one is up for debate, either way its imperial German M1871 pattern for the Mauser rifle, the pattern date is not usually the date it was made but the date the pattern was accepted for service and some could be made quite a bit later
(its actually easier to figure out on british and commonwealth bayonets are most are date marked)
It makes little difference as all it really means is it was inspected and passed for service twice, probably to different units a few years apart its not uncommon to find bayonets and other kit with multiple factur's and regimental markings
I have been wrong before but am reading the regimental number across the guard as 115 regiment, (R) infantry company 9 and weapon 229 (the rifle it belonged to) but this is clearly an overstamp, again that's not unusual on issued an reissued equipment, only a guess but the scabbard stamp belongs either to the previous issue that was overstamped or is from another bayonet, again neither is unusual but it is better for a collector to have matching numbers if possible
I hope my ramblings have helped