HAMO are DC locos, made by Märklin before they bought TRIX.
So they have no slider, no relay, but a DC motor (normally). There is a rather large chance that they are easily converted to 3R operation.
/lw

HAMO was manufacturer that Märklin bought in the 60:s, I think... The Märklin 2-rail DC loks were called HAMO until they bought Trix a couple of years ago. After the Trix merger, the HAMO loks were incorporated into Trix line of loks...

Basically HAMO loks are Märklin 2-rail DC locos with a Märklin motor - but using a "HAMO magnet" (discussed in many digital conversion scenarios) instead of the normal 2-coil stator of the "AC" motor in the Märklin catalog.

The other difference is that the wheelsets are isolated, as they must be when running 2-rail DC.

Since HAMO locos are originally Märklin locos, but adapted for 2-rail, normally there are already holes for the pick up slider mounting and such, so a reverse engineering effort to "restore" it to 3R operation is not such a big job, as Lars also points out.

With the SBB 460, you could get the 60901 set and install it after rewiring the internals & adding the pick up shoe, or use a LokPilot or similar - in case of keeping the original motor...

If you want to run it as a "pure AC" lok, then you will have to replace the "HAMO magnet" with a coil stator and add a reversion relay, but I think a LokPilot would be the better/easiest option in that case too, while keeping the original motor...

And - if you get them - and wonder more about on how to make them run, we are here to help you...