Vintage work crew photos

[Toolmaker51]

Worker holds a 193-pound bolt and nut. This was one of 16 fasteners used to join sections of the 75,000 kW generator shaft for the Grand Coulee Dam. 1942.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...w_fullsize.jpg

re that 7th of December poster:
I dropped it from this particular writing to not appear warmonger or jingo-istic, but older US readers may recall the immense volume of advertising [more accurately polite propaganda] of WWII.
Chevrolet, Cambell's Soup, Chris-Craft Boats, Shell Oil, Diebold Safe, PhilCo, ALCOA, Heil Truck Bodies, Timken Bearings, War Bonds, Remington (&) Colt (&) Winchester Firearms and countless other domestic manufacturers ran very distinct, usually full colorful full page advertisements on their particular contribution to the war effort. I don't recall any photographic entries, all were hand drawn and colored artwork. Many were by well known illustrators, including Walt Disney, and some by artistic employees of said company.
IMNSHO the finest appeared in 'Life" and "Fortune" magazines. Premier selections and those publications ideal placement for such a campaign; large size format, very wide distribution to households and offices alike. "Life" was a weekly centered on photo-journalisim, "Fortune" portrayed vivid interpretation and reporting of "Industrial Civilization". I commented earlier how [this thread] historically fortunate the golden ages of work and photography happened to coincide, with these magazines often near the center of preserving such images. While advertisements mentioned were drawings, mainly due to security issues, artwork depicted mood and implied motion differently than possible with film. Others were fully impressionistic, such as Disney's concept of the Axis, a giant black octopus spanning entire Pacific.

But largest percentage of ads paid less mention of adversaries or goons; the focus/ intent was to lift spirits that American Labor will persevere, then regain composure after hostilities. There I recall one of Chris-Craft; landing craft today - these for tomorrow. meaning they were not absorbed by the war either. "Look ahead with Chris-Craft" - ad of 1945 encourages order now, deliveries...will commence after relaxed wartime restrictions.
And a toast for what bolsters and builds an economy, Manufacturing above all.
Wikipedia has good articles for "Life" and "Fortune"