Antique magic lantern / projector glass slides Bruges

These are 3 3/4 inch square (3.75") They appear to be early 1900's but I do not know the exact date.Any questions about this or any of my other listings please just send me a message.I am happy to combine shipping for any items purchased through auction bids, please just let me know and allow me time to sent a combined invoice at the end of the auction.If you are outside of UK and wish to have an item shipped, contact me and I will look in to costs.