Phil - Your RR collection, in general, is without equal (though I'm trying!) and your run of Brutus issues (shall we say Bruti for plural 😝) are truly spectacular! I'm certainly not ashamed putting mine next to yours, though you still come out on top with quality. Your 503/1 is likely the finest in private hands and I really appreciate you putting me in your will for it. My 503 is the only coin in my collection that I know where it was found - Portugal December 31, 1953 in a hoard with a terminal issue of Domitian which means the coin circulated for about 130 years!.
Notably, my Brutus run is very well provenance with the "newest" oldest provenance being 1980 (that certain quinarius you made me trade a kidney for at auction...do you remember?). These include many famous collectors to include 2 coins from Tolstoi in 1912, a Nordheim, 2 from HP Hall, 2 from Mazzini, Sir Arthur Evans, Trau, and Vierdort.
Sorry about the various photo sizes. I don't know how to size them when posting here and I guess it's based on file size. Thanks for letting me ride on your coat tails.
Privately purchased from Spink & Son in January 1969;
Glendining, Edmund Nordheim, Esq. Collection, March 9, 1931 Lot 231 (sold for 1 Pound 2 Shllings to "B").
Collection Ing. G. Mazzini 1957 Volume 1, Plate V, Coin 5*;
Henry Platt Hall, Glendining July 19th, 1950 Lot 652 (illustrated, but a 2 part lot) sold to Cahn (£4/5);
Ars Classica Auction XVII, Sir Arthur J. Evans Collection, October 3, 1934 Lot 1108
Merzbacher Nach, Munich, Auction November 2, 1909 Lot 998 F.D.C. (30 Marks)
Lanz 78 November 26, 1996 lot 476;
Monnaies et Medailles XIX, June 5-6, 1959, lot 145 (80 CHF)
Jesus Vico Auction 129, TMCF (Tesouro Monetario do Casal de Fruime) hoard, June 7, 2012 Lot 127;
Discovered in the Casal de Friume Hoard - Ribeira de Pena, Vila Real, Portugal - December 31, 1953.
CNG Sale 76, Karl Sifferman Collection, September 12, 2007 Lot 1295;
Glendining Collection of Rev. W. L. Gantz of Abbots House, Stanstead Abbots, May 27, 1941 Lot 409 (£5/2/5-);
Sotheby, Wilkinson & Hodge, Collection of Horace Sanders, Esq, F.S.A, February 12, 1923 Lot 173 sold to Rev. W. L. Gantz. (£3 realized);
Adolf Hess Nach, Tolstoi collection March 11, 1912 Lot 628 (115 Marks)
Collection Ing. G. Mazzini 1957 Volume 1, Plate V, Coin 4;
Adolf Hess Lucern and Gilhofer & Ranschburg Vienna, Franz Trau Collection, Aucton in Vienna, May 22, 1935 lot 36 (30 Australian Schillings est );
Jacob Hirsch Auction 7, June 2, 1902 Lot 1047 (18 Marks)
Sternberg Auction X November 25 & 26, 1980 Lot 254 (2000 - 3500 CHF to Spink)
Bought from Peus, 7. Nov. 1957. Likely Peus FPL 257 lot 254 (100 DM);
Baranowsky FPL 1929 Part II & III Lot 1069.
Ed Waddell List No. 70, 1997 Lot 109 & Cover Photo ($5500);
Bankhaus Aufhäuser Auction 12, Heinrich Jellissen Collection, October 1-2 1996, Lot 404(3000 DM est);
Monnaies et Medailles, Oct 1984, Lot 475 (5000 - 7000 CHF);
Carlo Crippa FPL Jan-March 1972 Lot 375;
Luigi de Nicola June 1962 FPL Lot 376 (200,000 Lira);
H.P. Hall collection, Glendinning, 1950, lot 647 (£7/15) to Santamaria;
Hess, Lucerne, December, 1933, lot 250 (250 CHF);
Schulman - Amsterdam, Vierordt collection, 1923, lot 495 (25 Florians);
Adolf Hess Nach, Tolstoi collection March 11, 1912 Lot 787