Vine's Expository Dictionary: View Entry
TDNT Reference: 7:939,1127
σφραγίς sphragís, sfrag-ece'; probably strengthened from G5420; a signet (as fencing in or protecting from misappropriation); by implication, the stamp impressed (as a mark of privacy, or genuineness), literally or figuratively:—seal.
The KJV translates Strong's G4973 in the following manner: seal (16x).
a seal
the seal placed upon books
a signet ring
the inscription or impression made by a seal
of the name of God and Christ stamped upon their foreheads
that by which anything is confirmed, proved, authenticated, as by a seal (a token or proof)
Strong's Number G4973 matches the Greek σφραγίς (sphragis),
which occurs 16 times in 16 verses
in the TR Greek.