Vintage mid century modern chrome desk table lamp mushroom retro metal

I have a vintage lamp. It is all metal. The lamp is working and in great shape. I was looking for a brand on it but could not find one. Unsure of the age, we have had it 30 plus years, so I know it is at least that old. My guess would be 70′s or 80′s. Plus one is just a hair maybe 1/4 inch taller than the other. Thank you for looking.