Tiffany & Co sterling silver pens

I have two Tiffany & Co pens. I was actually wondering if anyone knew the time that these two pens are from. I found some that look like these and are from the 1930's. I was wanting to get an approximate value on them. I acquired them a while back and they are cool looking pens. For something as old as they could be they seem really modern in design. thanks if anyone can give me any info.