A pair of singular huge serving knife and fork rests

These are a very rare art deco pressed glass rests. They are very heavy (100 grams each one) and cut finished thus they are made of lead crystal. They are 10 cm long and 2.5 cm wide. I think that were done here in Argentina, the production of pressed glass was prosperous and there are lot of Argentinean carnival glass all over the world. http://en.wikipedia.org/wiki/Carnival_glass . They were done for the serving maitre of table to salt and pepper the food following the indications of the client. You know the proficiency of the clerks in Buenos Aires restaurants are excellent, they make you feel a king and till now it is that way. I was in restaurant near the Congress having lunch two days ago and a woman near me has asked for a salad. The maitre gave her the acetto and the olive oil, she poured them over and order him to take it away and revolved it far away, my elder son that was with me could not believe that. You can read and see some pics here, http://306lugares.blogspot.com.ar/2012/12/la-gran-taberna.html .