This one is complete and works.
As it came:
The dial is the same as this one:
bidfun-db Archive: Wrist Watches: 726: Gents Lanco-Fon, Manual Wind Alarm, ca. 1950 n.o.s. - but with blue tip to the alarm hand and a blue second hand. Around 1950.
This 'dust cover' is actually the bell. Note, I have read that some NOS Lanco-Fons from India are missing the bell - so take care.
Its an amazing movement. This video is kinda nice:
I forgot to take a picture of it on its new strap.
Watch buying budget now exceeded.