Now the bulbs: With the E27 it is wonderful for the Osram LED Star Classic A60 10W (replaces 60 Watt) - 827, E27, warm tone 130 degrees in normal lamp shape matt extra 220-240 volt 43602B1.
The desk lamp is the manufacturer for 25W bulbs or 11W bulbs (= saving lamp mercury waste !!) designed - thus I have chosen LED is 2700K with an ideal "partner" to this, moreover, inexpensive lamp.
My conclusion: Cool retro design, inexpensive, versatile.