Honestly wasn't planning on buying a watch, as I just got the steel Apollo 11 50th and i am saving for the Apollo 13 50th, but our OB had a major sale this weekend and was offloading all the stuff he hasn't been able to sell for over 3 years. The guy I deal with there said he had a watch worth looking at and kept it on the side for me, got there and it was the 300mc Ti and I was amazed at the comfort, legibility and adjustable clasp was awesome, the watch looked beautiful. The price was extremely good to pass, they gave me a very good deal on a watch that wasn't on sale also, a Oris Big Crown Bronze Pointer Date Green dial, so I got it as well . It was such a rush I wasn't able to ask the exact model of the 300mc, is there a way to find out other than calling them? I am guessing probably 2015/6.
Excellent choice! Funnily enough I bought the very same model two days ago. The 300MC line was released in 2014 so I would say a delivery in 2015/2016 to your AD would be a reasonable assumption. Did you get a new warranty card filled out for your 300? If so I wouldn't worry about the age of the watch if you've got 5 years to back it up. Think of it as essentially a new watch. Otherwise only your AD will know and thus it would be best to call them up.
The SM300 MC, whether steel, PM, or titanium, is still in its first generation. So your new blue beauty is 2014 or later. Still a toddler!
I never considered a titanium until I tried it and it was really light and comfortable. Also, the adjustable clasp is freakin awesome I never knew about it, the 300m depth with exhibition case back is very cool as well! definitely an under the radar watch, and will give the Sub a good run for its money.