Bathroom chrome tap spout aerator inserts

[DIYspanner]

Quite old taps, about 30 years.

I serviced the basin hot tap valve yesterday and noticed the water flow was not as neat as the cold tap.

Using a mirror, I saw the aerator, which seems to be an insert, was missing. The basin tap spouts measure 5/8" and the bath, 3/4".

Could not see thread on the spout so I presume the aerators are push in fit.

Can't see any on ebay. Anyone know a source?

Thanks!

 

[Wayners]

Have a look at the different aerators online.
Some screw inside so no visible thread line.
Maybe that's what your have