BCD Ticket Question - Who is Seller "Thr.S. Jan 1997" ?

[Broucheion]

Hi All,

I'm tracking down  a provenance for my one and only BCD coin (below). The coin was originally purchased by BCD in Jan 1997 from "Thr.S." . I assume it's a Swiss dealer, since we have a price of Swiss Francs 50. Any idea who that seller might be? (Sorry for the dark image.)

PTOLEMY IV PHILOPATOR (222-205 BCE)
GREECE, ARSINOE IN THE PELOPONNESUS (METHANA), ca 221-203 BCE
Group 1, of fine style

Æ TRICHALKON
Size: 18x19 mm
Weight: 4.67 g
Die Axis: 0
Broucheion Collection P-2016-12-18.001

Obv: Arsinoe Philadelphus head (assimilated to Aphrodite) wearing broad diadem and stephane, facing right. No border visible.
Rev: Nude helmeted warrior standing advancing to right, holding spear with his extended right hand and resting left on shield. In left field: A over P; In right field: [Σ over I]. Hint of a dotted border visible.
Refs: Lorber CPE-B520; Svoronos-Unlisted, but see pp 397-400.; SNG Copenhagen-147; McClean-6905; Gill (1997) Type A; BMC Crete, p 13, 1-2; Svoronos (1890), p 30, 1.
Provenance: Ex-Auctiones eAuction 54 (18 Dec 2016) Lot #51; Ex-BCD Collection via LHS Auction 96 "The BCD Collection" (8-9 May 2006), Lot #1331.3. Previously, Ex-Thr.S., Jan 1997. Published in Meadows (2017) "The coinage of Arsinoe-Methana", Dies A1/P2, coin 2c (this coin).

Thanks for your help!

- Broucheion

 

Edited September 26, 2022 by Broucheion
Formatting.