Pro Golf Ball Marker. Vintage. (ref nos073) – The Nostalgia Shop
Some folks collect logo balls or scorecards - I collect ball markers. Here are some I just fished out of my bag. Do you collect golf mementos? : r/golf
Lot of 5 Vintage Metal Brass Golf Ball Markers | eBay
Organize Your Golfing Gear With Wholesale vintage golf ball markers - Alibaba.com