I have one as well.
You had many 138 S models through the years. They all had a stand, what changed was the head. Condenser, color, cold light...etc.
Condenser being the oldest model.
About the condensers, basically the more you can have the better. You may need a specific combo one day. They sell on ebay for almost nothing now (or they used to). You also have the cold light option for this model. Which comes exactly like a condenser.
Another thing you need to be careful of is the light alignment. Very important.
Enjoy this "Metal Lego" !