The Registered Magnums had been phased out the year before, and these were all built to order for the customer with almost unlimited options for barrel lengths, finish, sights, grips, etc. So by 1940, the S&W Model 27 Revolver which had been introduced the year before, was the best bet. I would choose the 6-1/2” barrel version, I once had a 6-1/2” 27-2 a 1978 vintage that I always regretted parting with, and now I’m getting a 6-1/2” 27 Classic since I always thought this was the revolver I always liked shooting the best.