the London market. They had appeared on the London market in 1998 and were accompanied by a "French passport". Three were unsold and are back on the market (now Bonhams 28 April 2010, lots 399 , 400  and 401 ).
Their "provenance" (or more accureately collecting histories) state:
"Acquired on the London art market in 1998. Accompanied by a French export licence."See earlier comments.
I wonder which dealer handled them and who has consigned them to this sale.
Detail of the rear of the head of a Roman limestone statue.