  Precision CCD uvbyCaHbeta photometry is presented of the old cluster, M67,
covering one square degree with typical internal precision at the 0.005-0.020
mag level to V~17. The photometry is calibrated using standards over a wide
range in luminosity and temperature from NGC 752 and zeroed to the standard
system via published photoelectric observations. Relative to NGC 752,
differential offsets in reddening and metallicity are derived using astrometric
members, supplemented by radial-velocity information. From single-star members,
offsets in the sense (M67 - NGC 752) are Delta E(b-y) = -0.005 +/-0.001 (sem)
mag from 327 F/G dwarfs and Delta [Fe/H] = 0.062 +/- 0.006 (sem) dex from the
combined m1 and hk indices of 249 F dwarfs, leading to E(b-y) = 0.021 +/- 0.004
(sem), and [Fe/H] = +0.030 +/- 0.016 (sem) for M67, assuming [Fe/H]{Hyades} =
+0.12. With probable binaries eliminated using c1,(b-y) indices, 83 members
with relative parallax errors < 0.02 generate (m-M)_0 = 8.220 +/- 0.005 (sem)
for NGC 752 and an isochronal age of 1.45 +/- 0.05 Gyr. Using the same parallax
restriction for 312 stars, M67 has (m-M) = 9.77 +/- 0.02 (sem), leading to an
age tied solely to the luminosity of the subgiant branch of 3.70 +/- 0.03 Gyr.
The turnoff color spread implies +/- 0.1 Gyr, but the turnoff morphology
defines a younger age/higher mass for the stars, consistent with recent binary
analysis and broad-band photometry indicating possible missing physics in the
isochrones. Anomalous stars positioned blueward of the turnoff are discussed.
