"I think you are right, there is no way they could have been sold in 1978"

Meaning: 16660 Sea-Dweller was introduced in 1980.

Meaning 2: I have just bought the first production Sea-Dweller w/sapphire crystal, 3035 machine and transitional dial, being serial number 64XXXXX.

Meaning 3: I am extremely thrilled.

meaning 4: EXTREMELY THRILLED!!