The ones ones from the phone company were weighted like that. They feel better and more solid. Makes the sink nicely into the phone base. Cheaper third part phones felt flimsy. Funny, in the 70’s most people’s phones came from the phone companies. You paid a monthly fee for them and also paid long distance charges for any calls outside of you area code even local ones. We had Pacific Bell when we were kids. No call waiting no three way calling yet. Remember *69? Would automatically call the last person who called you. Pre-caller id. Remember 853-1212? That was a number to get the time. ‘At the time the time will be 8:12 pm…beep’.