thanks so much to whoever messaged to point out that a photo of the red Pensa features in the 'On The Night' CD booklet! 
Hello and welcome to the forum.
If I understand correctly the information, is it possible to visit the guitars on display in Christie's at London, freely? Or is needed to get tickets, reservation etc?
Would remain the guitars on display after the public sale for a period of time or that would be closed after the sale?
Thanks in advance.
Hello and thanks for the welcome! Yes of course, everyone is welcome to visit - it is free entry, no reservations required (all Christie's exhibitions are free entry) and we even have free barista coffee in the lobby. The exhibition will close on 30th Jan, with the auction following on 31st Jan, so the guitars will not be on display after the sale.
Viewing
19 Jan 10:00 AM – 5:00 PM
20 Jan 12:00 PM – 5:00 PM
21 Jan 12:00 PM – 5:00 PM
22 Jan 10:00 AM – 8:00 PM
23 Jan 10:00 AM – 5:00 PM
24 Jan 10:00 AM – 5:00 PM
25 Jan 10:00 AM – 5:00 PM
26 Jan 10:00 AM – 5:00 PM
27 Jan 12:00 PM – 5:00 PM
28 Jan 12:00 PM – 5:00 PM
29 Jan 10:00 AM – 8:00 PM
30 Jan 10:00 AM – 5:00 PM