Altered Date? Contemporary? Straits Settlements 1916 1/4 Or 10 Cents?

Plus the coin is corroded, probably from being in the ground or something like that.

I would classify it as an "attempted counterfeit".

The 1/4 cent is about the same size as a 10 cent. It is, of course, made of bronze rather than silver. So what has happened here is that someone has taken a normal 1/4 cent, carved a crude "10" onto it, then they would have given it a silvery coating or paint (possibly by soaking it in liquid mercury) then they would have tried to spend it.

It wouldn't fool you or me - certainly not at that magnification, and not with the silvery coating having disappeared with time - but a counterfeiter only needs to fool one person, once, and it's job done as far as they are concerned. Counterfeiters don;t care what their coins will look like decades or centuries later.

Altering coins to make them look like a coin of higher denomination was and is a crime, with punishment similar to that of outright counterfeiting.