Ron, are you asking this question because you have found a lettered OSS shipped Commando? If so, congratulations. Per Pate "OSS records indicate some overseas issues of Commando revolvers, and most of the early two-inch barreled revolvers were sent overseas. But for the most part, the Commando was bought for the DSC. The SOD historical report for April-June 1944 stated:...all Commando Cal. .38 Special revolvers were being allocated to the Defense Supplies Corporation. During the period, this agency complained about the premium that was being paid to the Government as a handling charge. An agreement was reached that Defense Supplies Corporation was to deal directly with Colt's and Ordnance contracts with the company were canceled with no charge to the government."