I can not be certain, but I think they are Altec Lansing Model 83 acoustic suspension three way speakers. These should not be confused from the System 83 speakers. By this time Altec were in advanced decline and sold for "shirt buttons" for their name. Their speakers from this era were not very good. If those speakers are what I believe they are, then they fetch around $100 or less on the used market.
These came from the eighties when Altec were in advanced decline.
After the fire sale long time employees formed
Great Plains Audio to manufacture and restore Altec speakers from their glory years.