Panasonic PT-43LCX64 Service Manual page 35

TO DISTINGUISH THE PROJECTION
LENS UNIT OR THE PROJECTION UNIT
The only difference between the 43 inch model and the 50 inch
model of the Projection Unit is the Projection Lens. To
distinguish, see marking (Z or A) on the Projection Lens.
And the 60 inch model of the Projection Unit is placed label on
the Projection Lens.
43/50 inch model as shown
X X X A
<Front View>
Z with red: for 43 inch model
A with black: for 50 inch model
60 inch model as shown
<Front View>
LSDL0248 with Yellowish green label: for 60 inch model
Note:
LSDL0248 is not the part numbers of the Projection Lens as a
replacement part.
Z or A
LSDL0248
And also, see the stamp on the Lamp Wall of the Projection
Unit. (The stamp has been added on a running change basis.)
Stamp
43"LSXA0571
50"LSXA0572
60"LSXA0573
: for 43 inch model
: for 50 inch model
: for 60 inch model