It looks like shameless self-promotion is back again, so in that spirit, Heracles pre-orders are open for next month!
https://the-rite-stuff.com/products/the-rite-stuff-heracles-work-shirt-indigo-pre-order-for-april-2020
New details include a longer collar, wider pockets, narrower back placket, and less taper to the waist.
Pictures here with the Pacemaker pants in Sun Tan and the Wild Frontier Goods Blackburn belt.