Sweethart or Queen of Hart Oil Lamps

Recenty inherited three clear glass oil lamps from a Great Aunt -
Any information you my have would be greatly appreciated, (rairity, value, etc.).

1st lamp meassuers the smallest 6.5" tall without the chimney and with the chimany 9" tall, with no chips or damage.
2nd lamp meassures 8.5" tall and does not have a chimney, but is a finger lamp, no chips or damage.
3rd and last lamp meassures 9.5" tall without the chimney no chips or damage.

All three lamps have their original brass burners