The 36 indicates it's a model 36 the model made prior to the present 336. The "A" indicates it should have a 24" barrel. The "DL" indicates it has a checkered stock. I have no inkling what the additional "A" stands for.
Here are some pics of the A DL A. Im also gonna add a few of my 1950 waffle top. Is like to see som opinions of value as I might need to sell them soon. Thanks.