That W-SS watch was an Artillery tool.
The watch was meant to be placed in some kind of sightning device, so it could be read as a reflection.
That is the explanation I read some years ago.
Off Topic History lesson:
Yes, the vast numbers of SS soldiers were in fact ordinary (but elite) military guys, not the murderers they are remembered as today. That branch of SS was called Waffen SS (Weapon SS). In battle they were placed under the command of the normal Armed Forces leadership.
The murderes were a very, very small group. THey belonged to so called Einzats gruppen SS, which were a separate, paramilitary part of the SS organisation, under own command. They did not do any military work, or receive much military training. They were selected and indoctrinated, to be brutal, brainless murderes.
If you were a Frenchman, Swede, Czech, Estonian, Latvian, Bielorussian or any other nationalites (incl some British and US!), you could only enroll in the SS if you wanted to fight with the Germans against the Soviet Communists. More than half (60-70%) of the soldiers of W-SS were foreigners.
Only from Sweden, there were a couple of thousand volunteers.
Wehrmacht, Luftwaffe etc were only for Germans or men with proven German ancestry
SS had infantery, some aircraft, artillery, tanks, grenadier, paraschute units, hospitals, transport units etc. They were trained to an Elite standard, and sometimes used as "disposable" units on the worst sectors.
if a W-SS soldier was taken as a POW, they were treated as normal soldiers. After the war, the surviving Swedish members were seen by most people (non communists) as good guys, heroes, for themfighting the Soviets.
Many Swedes joined the Finnish Army, to fight the Soviets in the Finnish - Soviet wars.
If a member of the Einsats gruppen was cought, well, he received a bullet, if he was lucky.
I am just trying to explain some facts, that more or less are forgotten, and explain why I have nothing against the W-SS insignia.