You got a great Rolex. The Rolex Expl. 2...............the stealth Rolex! You can swim w/ it....I don't wear watches in bath, shower, hot tub, steam room or sauna......but swimming...fresh or salt water no problems....I have 2 1655 Expl. 2's, both purchased new and they're bulletproof!
Had them renovated in 2005....
1973 Expl. 2 # 1655

1974 Expl. 2 #1655