1. Buy references first, spend money on stuff second.
2. If you do not know what it is, then do not buy it.
3. Speculators vacuum up everything military that is for sale in the hope that 'it will be worth money', collectors selectively purchase items that they know will fill their collection.
You will never learn these lessons if you continue to keep posting your finds to a forum in the hope that the forum members will identify them for you. More importantly you leave yourself open to loose a lot of money by purchasing things that you do not know what they are.
Research what you bought and come back and let this forum know what you have. From this you will learn more and be a much better informed collector.