Matthew 24:5, NWT says:
for many will come on the basis of my name, saying, ‘I am the Christ,’ and will mislead many.
The Watchtower Society, representative of the "faithful slave class", not only has claimed approval as God's channel, but well after this claimed appointment has freely claimed to be THE CHRIST.
The Watchtower, August 1, 1944, p. 237:
From the very beginning of his ministry Christ Jesus had a visible organization, and his apostles, acting collectively under his direction, formed the visible part of it. There Was unity of action by the faithful apostles. With the passing away of these the unity did not again exist in the church until the Lord came to the spiritual temple of Jehovah in 1918. Upon his coming to the temple he found a faithful "servant" class, and these faithful ones are made the keepers or custodians of the Kingdom interests. (Matt. 24:45-47) Such are brought into the temple condition of unity of action with him and are made a part of the ’elect servant’, because they form a part of The Christ and abide in Christ. Throughout the prophecy of Ezekiel Jehovah addresses him as "Son of man", manifestly because Ezekiel pictures that class which is counted in with and made a part of The Christ, the Head of which was called "the Son of man". The man with the writer’s inkhorn by his side clearly represents, therefore, the anointed "faithful and wise servant" class on earth, which class is a part of God’s organization.
The Watchtower, May 15, 1941 p. 155:
"The Christ" is composed of Jesus the Head and the church, which is "his body" and being composed finally of 144,000 members. (See Revelation 7:4-8 and 14: 1-3.) It is not unusual for the Scriptures to refer to The Christ collectively, or as one.
ibid, p. 156:
With the exception of Jehovah God, no one outside of The Christ will ever be incorruptible. It is to The Christ alone that the promise is given that over such the second death will have no power. (See Revelation 2: 11; 20: 6.) None outside of Christ will ever receive immortality. These are they that are admonished while on earth to seek immortality. (Rom. 2: 7) The members of The Christ while on earth are, by God’s will and his precious promises, begotten to an "inheritance incorruptible .... reserved in heaven", which is life divine in the spirit.
ibid, p. 158:
The Lord Jehovah has been during the past nineteen centuries developing and is now completing the "new creation", which is The Christ. (2 Cor. 5 : 17 ; Gal. 6 : 15) This new creation stands out separate and distinct from Satan’s organization.
The Watchtower, Oct 1, 1941, p. 292:
The world of righteousness consists of the invisible, which is The Christ, and the visible, which, is the representatives of The Christ on earth.
The Watchtower, Nov 15, 1941, p. 340:
Sarah pictured God’s "woman", Zion, which is the mother of Christ and the 144,000 members of "his body", therefore The Christ, and which includes the faithful remnant yet on the earth.
The warning is repeated in Luke 21:8, along with another tell-tale characteristic to look out for:
He said: “Look out that YOU are not misled; for many will come on the basis of my name, saying, ‘I am he,’ and, ‘The due time has approached.’ Do not go after them. (NWT)
Of course, the Watchtower Society accommodates this additional characteristic all too well:
The Watchtower, April 1, 1944, p. 99:
It is founded on the fulfilled Word of God and upon the known facts since 1914, which facts are fulfilling his Word and prove that the time is at hand.