The oldest telescope?

This  little tin tube  doesn’t look like much,  but Dutch archaeologists working in the city of Delft say that once cleaned up,  it proved to be a primitive telescope,  capable of magnifying objects up to five times.   Likely a gadget owned by a wealthy citizen,  its is thought to be from the early 17th Century,  as by 1650 tin was no longer used for such items,  and much better lenses were available.