Full disassembly
crwdns2944766:0crwdne2944766:0
crwdns2918718:0crwdne2918718:0crwdns2935091:0crwdnd2935091:0crwdne2935091:0
crwdns2916646:0crwdne2916646:0
There are two "sub-series" of the 4200s: 4210s, which didn't have a handset, and the 4250s, which did.
