Impossible to answer without a detailed description of all markings, finish, condition, etc..
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The exact value of a Browning 1973 U73 22 pistol made in Belgian is actually dependent on a number of factors. Most importantly, the condition of the pistol.
it was made in 1967
Who made it?
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Serial number data not available
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This gun was made in 1966
It was made in 1929
This gun was made in 1971
It was made in 1971.
This gun was made in 1961.
It was made in 1930
This gun was made in 1953
This gun was made in 1951