Only Online Auction

Hong Kong, Mar 03, 2021

LOT 147

Mulco (Muller & Co.)
Ref. 250-201, self-winding, diver’s, centre-seconds, date, black dial, “Super-Compressor” patented case; “Escafandra”; stainless steel

HKD 4,400 - 8,700

CHF 500 - 1,000 / EUR 500 - 950 / USD 600 - 1,150


Sold: HKD 8,500

Stainless steel, self-winding, round-shaped, diver’s wristwatch, water-resistant with screwed case-back, 60-minute graduated bidirectional revolving inner bezel for the decompression times (setting by the crown at 2 o’clock); black colour dial with centre-seconds and one horological complication:
· Instantaneous date of the month (aperture at 3 o’clock under Cyclops lens)

Grading System
Grade: A


Case: 3-8


Slightly scratched

Movement: 3 *
Dial: 3-01


HANDS Original

Brand Mulco, La Chaux-de-Fonds

Model “Escafandra”

Reference 250-201

Year circa 1963

Movement No. unnumbered

Case No. unnumbered, “Super-Compressor” patents (dated 6-63)

Material stainless steel

Bracelet black rubber strap

Buckle stainless steel buckle

Diameter 43.7 mm.

Caliber AS 1712 (by A. Schild S.A., Grenchen / Granges)

Width 36.1 mm.

Signature dial, case and movement

Accessories copies of the invention patents


Case based on the Swiss invention patent No. 317 537, delivered on November 30, 1956 (application filed on November 22, 1954), to Ervin Piquerez, Bassecourt (Bernese Jura), for a “Boîte de montre étanche” (Water-resistant watch-case).

Case based on the Swiss invention additional patent No. 337 462 (subordinate to the main patent No. 321 578), delivered on March 31, 1959 (application filed on August 13, 1956), to Ervin Piquerez, Bassecourt (Bernese Jura), for a “Montre munie d’un organe de commande du mécanisme intérieur” (Watch fitted with a control device for the inner mechanism).