As were the occasional hammerless; a 1931 Smith Ideal 12g SN 135983. The gun was manufactured without a manual safety, the top tang being solid with no slot for a sliding safety. Behind the triggers, a square block was installed upon which pivots a somewhat rudimentary grip safety blocking both triggers until depressed.
I need to ask Dr Jim to check the SN for the factory specs



And the Whitney
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=190112

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