The listing for penthouse B at the Apple Bank Building has returned this week, asking $9.68 million. The David Abelow-designed condo first appeared on the market a year ago, asking $12 million. Then the property was delisted earlier this year after dropping its price to $10 million. Now, this 4,055-square-foot duplex may reside in a Beaux Arts building built in 1927, but you wouldn’t know it by the looks of its modern interior. In fact, house hunters might be pleasantly surprised to find a state-of-the-art, chef’s kitchen right out of the space age waiting for them as they enter.