Remington UMCM51. The pistol had pitting in it’s life and appears to have been reparkerized at some point. It has 15 Grooves in Slide. Grips are crack free and it is an approx. a 1920 era production. I have fired this pistol and it functioned flawlessly. This has been in my collection for many years. Face to Face meeting at the Local PD parking lot where they have a complementary parking area for ecommerce transactions. Must be a FL resident with valid FL ID/CCW. Cash transactions only. I have been collecting firearm's and accessories for 30 years and I have made a decision that the time has come to pass it on. Please check my other listings as I will be posting additional items weekly. Thank you!