Both kit number #6321 ... on top: the older one without (c) ... Differences (3): the missing (c), another barcode & bar code number (the older kit number: 1-0734) and the writings in the right bottom corner "ERTL Stock #6321 replaces MPC Stock #1-0734"
Both kit number #6321 ... on top: the older one without (c) ... Differences (2): text "6321-12EO" under "ROLL BAR" in the left picture is style bolt, the yellow box totally different
Both kit number #6321 ... the older one is on the left: the younger one without (c) ... Differents (3) writing in the left upper corner, then underneath the MPC-letters, writings in the right corner at the bottom
Both kit number #6321 ... on older the left ... Differents (3) writing in the left upper corner, then underneath the MPC-letters, writings in the right corner at the bottom
(1) T4950344241002 - (c) 1990 with english textes
(2) 4950344989294 - (c) 1990
(3) 4950344995172 - (c) 2021
On the top (1) are non chinese / japanese textes printed, EAN-codes are different as well as the writing below the TAMIYA logo, the color names are printed on (2) and (3)