Looks like it has something like "9597" in registration/serial. See photo
With Thanks to ehusmann (@ scramble mb) it has been ID'ed as
NATO B707 LX-N19997 8)

Others seen:
Burssels (BRU) 13-07-2006 0745L
N711MN BD700 (9002)
N666MX Ce560XL (560-5292)
OY-LJF Lj60 (60-173)
OO-EPU Lj45 (45-291)
SE-DYB Da100 (216)
LX-IRE Da50EX (324)
D-IICE Be.200
Brussels (BRU) 13-07-2006 1945L
CS-DHP Ce550 (550-1104)
D-CAWU Ce560 (560-0042)
CS-DRN HS125 (258772)
N408QS GIVSP (1308)
T.19B-11/35-29 CN.235 (Mil-side)
Thanks in advance, Michael