The relief was damaged in the last few centuries, but there is enough to consider this the same gesture, repeated here in this relief , possibly of Shapur II ... 
J. Grelot's drawing for A. Bembo in 1674 
1: In "Ardashir and the Sasanians' Rise to Power" by Dr. @tourajdaryaee & "ReOrienting the Sasanians" by Dr. @sasanianshah I did not see these connections.
Here's the deal: 1: various Iranian groups, like others in Eurasia, used various standards or banners in war 
Based on the analysis in "Ancient Iranian metalwork in the Arthur M. Sackler Gallery and the Freer Gallery of Art" it's likely early Sasanian
Other depictions @ Persepolis: 
B) Some sources note "win" and "win-kenār" are types of harp, e.g., 
An older drawing without some of the details (1); 
I started this research to show Simurgh should not be called the "dog-bird". Along the way, I found ancient & modern breeds across the Near East and Central Asia regions, with a lot of continuity 
Together with refs to royal colours, like Hamza al-Isfahani's Tarīk̲h̲ sinī mulūk al-arḍ wa ’l-anbiyā, we can work on recreating colours of that era
Crossing Karun and Karkheh
کدام آهو افکنده خواهی به تیر 
2: also Ctesiphon
1) Mele Hairam: a number of important late Parthian-Sasanian finds. Likely a fire temple 
One example from Tepe Hissar
Various seals & other objects were found @ Bandian. As far as I know, this particular one hasn't been fully published.
"The hoard is a collection of about 20,600 ornaments, coins & other kinds of artifacts, made of gold, silver, ivory, etc., that were found in six burial mounds erected for five women & one man, with extremely rich jewelry, dated to around 1st C BCE-1st C CE."
with properly constructed, logical hypotheses in any field of human logic.
I find it fascinating because by all accounts in Sasanian Middle Persian & modern Persian, year = sāl
I previously wrote on sources mentioning "nogruz" or Nowruz, as well as some of Nowruz' history:
Numerous later sources link it to the Indo-Iranian figure/king Jamshid/ Yima