Patek Philippe VINTAGE box Years '80 Perpetual Calendar Ref. 3940 First Series VERY RARE

Original Patek Philippe VINTAGE box from Years '80 for Perpetual Calendar model Reference 3940 First Series. VERY RARE. In good condition 70%. Leather box inside damaged (see pictures). No outer box. Sizes of the box: cm 14,4 x 11,8; height cm 5,9.