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Ho realizzato una piccola tabella con le date di cambio formato delle targhe nelle singole province italiane. I dati sono estrapolati da Targheitaliane.it
P ultima quadrotta ultima nera
AG 1976/03/19 1985/06/21
AL 1976/01/28 1985/06/05
AN 1976/01/08 1985/06/25
AO 1976/05/14 1985/12/04
AP 1975/12/01 1985/06/11
AQ 1976/01/16 1985/04/05
AR 1976/02/01 1985/06/03
AT 1976/01/04 1985/05/16
AV 1976/01/20 1985/10/08
BA 1976/01/19 1985/04/17
BG 1976/02/02 1985/05/16
BL 1976/05/07 1985/08/01
BN 1976/01/20 1985/06/20
BO 1976/02/19 1985/05
BR 1976/02/09 1985/04/16
BS 1976/02/20 1985/05/16
BZ 1976/01/30 1985/05/08
CA 1976/02/23 1985/06/25
CB 1976/01/16 1985/06/06
CE 1976/01/14 1985/05/29
CH 1976/02/13 1985/07/18
CL 1976/01/16 1985/08/08
CN 1976/01/14 1985/08/02
CO 1976/02/27 1985/04/12
CR 1976/02/12 1985/06/18
CS 1976/01/02 1985/04/30
CT 1975/12 o 1976/01 1985/05 o 06
CZ 1976/01/02 1985/07 o 08
EN 1976/03 o 02 1985/05/21
FE 1976/01/05 1985/07/19
FG 1976/01/12 1985/07/25
FI 1976/01/02 o 03 1985/07/01
FO 1975/12/23 1985/07/05
FR 1976/01/29 1985/03/29
GE 1976/02/06 1985/10/23
GO 1976/02 o 03 1985/07
GR 1976/02? 1985/08
IM 1975/12/30 1985/04/30
IS 1977/01? 1985/05
LE 1975/12 o 1976/01 1985/06 o 07
LI 1975/12? 1985/06 o 07
LT 1976/05 o 06 1985/04/26
LU 1976/01/02 1985 dopo il 05/23
MC 1976/07/01 1985/06/07
ME 1976/02 o 03 1985/06 o 07
MI 1976/01/27 1985/05/08
MN 1976/01/13 1985/09/10
MO 1976/01/05 1985/08/27
MS 1976/04/02 1985/05/08
MT 1976/02/04 1985/11?
NA 1976/01 1985/05/09
NO 1976/03/03 1985/07/05
NU 1976/01/22 1985/07
OR 1976/03? 1985/06?
PA 1976/02? 1985/05 o 06
PC 1976/03/31 o 04/01 1985/06
PD 1976/02 o 03 1985/06
PE 1976/01 1985/ 06 o 07
PG 1975/12/15 1985/07/05
PI 1976/01/21 1985/05/17
PN 1977/02/20? 1985/06
PR 1975/12o1976/01 1985/09 o 09
PS 1976/01/31 1985/09/06
PT 1976/03? 1985/05/03
PV 1976/01 o 02 1985/08
PZ 1976/01 1985/05 o 06
RA 1976/01/13 1985/07/18
RC 1976/02 o 03 1985/05/02
RE 1976/01/18? 1985/07/02
RG 1976/01/12 1985/03/28
RI 1976/01/21 1985/08/29
RM 1976/01/24 1985/05/02
RO 1976/05? 1985/06 o 07
SA 1976/02/03 1985/05?
SI 1976/06/15 1985/10?
SO 1976/01/30 1985/06/12
SP 1975/12/23 1985/10?
SR 1976/01/13 1985/08
SS 1976/05/03 1985/07/29
SV 1976/02/26 1985/11/05
TA 1976/02/23 1985/04/17
TE 1976/01/25 1985/09
TN 1976/01/21 1985/05 o 06
TO 1976/02/11 1985/07/03
TP 1976/02/12 1985/06/06
TR 1976/02/18 1985/08/21
TS 1976/01/05 1985/05 o 06
TV 1976/01/29 1985/04/03
UD 1976/01/22 1985/05/17
VA 1976/01/08 1985/05/28
VC 1976/01/14 1985/07/02
VE 1976/01/09 1985/06 o 07
VI 1976/01/08 1985/06
VR 1976/01/28 1985/04/26
VT 1976/02/06 1985/07/31