The following two pictures are from the collection of "Salty" Payne.

USS Helena CL-50 prior to launch (stern view)

USS Helena CL-50 launching

3 pictures of the USS Helena CL-50 launching in 1938.
All are 8 X 10 originals.
Scanned by your Editor on 7 April 2008.

The USS Helena CL-50 is Commissioned. In 1939 at the Brooklyn Navy Yard.
Permission to post this picture and the reverse side granted by vintagephotohub.
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Below is the back side of the above picture.

Found on eBay with permission to copy and post.
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Pictures provided by Charlie McClelland, USS Helena CL-50. "F" Division S1C 1941 - 1943.

Air view of Pearl Harbor's 1010 dock.

Bomb Damage to the Navy Yard Pearl Harbor 1010 Dock. December 1941.
That's the USS Helena CL 50 on the left.

The USS Helena CL-50 at the 1010 dock
in Pearl Harbor on December 7, 1941.
Cassin and Downers are burning in drydock, ahead, with the Pennsylvania.
Helena has a torpedo hole in her starboard engine room
and Oglala is lying on her side in the foreground.
An aerial torpedo went under USS Oglala and hit the Helena.
Oglala, which had been tied up alongside the Helena,
was towed clear before capsizing.

Picture provided by LTJG Bin Cochran