Right fork mounting point I was given an old racer frame and some parts which I am converting into a single speed commuter.

The front right fork has a small toothed mounting point, it looks a bit like it could have held a light or similar in a past life.

Can anyone shed some light pardon the pun on what exactly this mount point is and what it was used for.




Also are there any potential modern day applications for this mount point, does anyone sell any LEDs or adapters that make use of this interesting little feature.
Hard to tell from the photo whether a light or something else was mounted there in the past. It's certainly possible. 

There aren't any modern lights I'm aware of designed specifically to mount to the side of the fork like that. Many dynamo hub lights are designed to mount to the joint of the left/right sides (i.e. the crown) of the fork, but that type of mount wouldn't fit well on the side. 

It would be fairly easy to take a small piece of plastic or metal tubing and an appropriately sized screw, and create a small mount that a regular bike handlebar light mount could go on. For a step-by-step example, see this blog post. Below is a picture of their final setup: