Of the five recorded covers with a combination or mixed franking of both of the two 1897 Victorian Charity stamps:

The five recorded covers are displayed below and grouped as follows:

See elsewhere for a listing of the 1d (1/-) multiples and the 2½d (2/6) multiples used on cover.

Combination franking.

22 October 1901.
Melbourne for local delivery.
Single of each denomination tied to a plain cover with a Melbourne CTO cancel.
Clearly a philatelic usage.
Provenance: Status Julu 1992 Lot 1469.
Abacus Auctions May 2018 Loy 512.

25 October 1897.
Melbourne to Sydney
9d registered inter-colonial letter rate 3rd step;
Registration fee 3d, postal charge 2d * 3 plus a convenience overfranking of ½d.
Has two pairs of the 1d (1/-) and three singles plus a 2½d (2/6) single.
Provenance: Millennium Auctions April 2003, Lot 656.
Prestige Philately, December 2010, Lot 486.
3 November 1897;
Law Courts in Melbourne to Sydney;
Pair of the 2½d (2/6) stamp plus a single 1d (1/-) blue.
Franking pays the 6d registered inter-colonial letter rate.
Provenance: Prestige Philately, January 2004, Lot 626 and
Prestige Philately, May 2012, sale 173, Lot 733.

Mixed franking.

25 October 1897.
Melbourne to Ronneburg, Germany.
5½d registered cover (2½d foreign letter rate plus 3d registration fee);
Only combination or mixed franking cover for this issue to an international destination.
Mixed franking of two 1d (1/-) blue,a 2½d (2/6) brown and a 1d brown Reading.
Has superb Ronneburg arrival backstamp of 28 November 1897.
Provenance: Abacus Auctions Sale 239 December 2019 Lot 1530.
6 December 1905 (very late usage); South Yarra to Stawell
5d registered intra-colonial letter rate (2d intra-colonial rate and 3d registration fee).
Same address and handwriting as on a
cover shown elsewhere with a 2½d (2/-) pair.

Provenance: Prestige Philately, November 2011, Lot 493.