Luke71730

Thank you! The remaining STI serial number records only go back to 2015 so they would not be able to provide any info on those serial numbers. They no longer sell slides as separate units anymore.

Thank you! I will do that. I wasn't sure if they were still in business.

The STI has 2011 and ST 25 stamped onto it. The SPS has a 4 digit serial number on it. The RI has Tripp Research Inc out of Austin TX. It has an early Tasco Red dot on it. I am thinking these are all from the early 90's. Any Help would be appreciated. Thanks, Luke