Hi all!
I'm looking at an Enicar Ultrasonic Alarm watch. I'm concerned that the watch is missing its caseback (see picture below), but the seller insists that it is complete.

Pictures of similar Enicar Alarms all seem to have a signed screw-on caseback:
www.ebth.com
vintagewatchspecialist.com
Can anyone with experiece with this model tell me whether the watch is complete or missing its caseback?
Many thanks!
I'm looking at an Enicar Ultrasonic Alarm watch. I'm concerned that the watch is missing its caseback (see picture below), but the seller insists that it is complete.

Pictures of similar Enicar Alarms all seem to have a signed screw-on caseback:
Vintage Enicar Ultrasonic Stainless Steel Stem Wind Alarm Watch | EBTH
Bid on Vintage Enicar Ultrasonic Stainless Steel Stem Wind Alarm Watch online at Everything But The House. Bidding on most items starts at $1.

Enicar Ultrasonic - Gold Plated Alarm Watch - New-Old-Stock Condition - c.1960s
A Fantastic New-Old-Stock (NOS) Enicar Ultrasonic Manual Alarm Watch with a Beautiful Dial and Gold Capped Case, a Superb Purchase, c.1960s Enicar, a revered Swiss watch brand, traces its origins to 1913 when Ariste Racine founded it in La Chaux-de-Fonds. The brand name is a reverse anagram of...

Can anyone with experiece with this model tell me whether the watch is complete or missing its caseback?
Many thanks!