Add crystal part number.

display/hardware/display.sch

@@ -983,6 +983,8 @@ F 0 "Y1" H 3800 3768 50  0000 C CNN
 F 1 "32768Hz" H 3800 3677 50  0000 C CNN
 F 2 "Crystal:Crystal_SMD_MicroCrystal_MS3V-T1R" H 3800 3500 50  0001 C CNN
 F 3 "~" H 3800 3500 50  0001 C CNN
+F 4 "2195-MS3V-T1R-32.768KHZ-7PF-20PPM-TA-QC-AUCT-ND" H 3800 3500 50  0001 C CNN "Digikey PN"
+F 5 "https://www.digikey.de/product-detail/de/micro-crystal-ag/MS3V-T1R-32-768KHZ-7PF-20PPM-TA-QC-AU/2195-MS3V-T1R-32-768KHZ-7PF-20PPM-TA-QC-AUCT-ND/10500146" H 3800 3500 50  0001 C CNN "Digikey Link"
 	1    3800 3500
 	1    0    0    -1  
 $EndComp