commemorative items

Here is an image of my personal tribute display to Jack Phillips and Harold Bride. I hope that you like it!

I notice the Lusitania 'propaganda' medal pops up, dozens at a time every month on Ebay. Were these medals mass produced? Were there different versions? If so, which version of the medal was the rarest, and the most collectable? What should a collector look for? To my uniformed eye, all the...